I'm working on a C library that reads tag information from music files. I've already got ID3v2 taken care of, but I can't figure out how Ogg files are structured.
I ... |
I am not an expert in programming but have some experience. It is more than a week that I am trying to read a data file from C into a Fortran ... |
Good day all.
I have a file that contains data which some part is shown below.It contains the records at every 3seconds taking for a period of 30 days. I want to ... |
I'm currently getting a run-time check failure #2 - stack around the variable city was corrupted. The input file that is read is formatted like so:
Betty, 12 Main Street, North Elmo, ... |
I have a txt file named prob which contains:
6 2 8 3
4 98652
914
143 789
1 ...
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i am getting problem,when i tried to open a file in read binary mode.
The code is.
PT_LONG LoadDataFromFile1( const char *pFileName, unsigned char **ppBufer, PT_LONG *pLenData )
{
PT_LONG retVal ...
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I am new to C in linux. I am trying to store data to file and read them back. Is this the correct way. When I try to compile this i ... |
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At line 25 having attempted to open the file you do not check to make sure the file is actually open and then output a suitable error message if it is not. Since you have not posted the (abbreviated) contents file you are trying to open it is not possible to say if your code is doing the correct thing. |
P: 1 Jeff Mwango #include #include #include #include "ibldl1.h" #include "nrlin1.h" int main() { //double ir[]={}; //our variables double al,p1; int M,N,Nsred,k; char *s1,*s2,*ss; FILE *ff; //Assign the constant part of the filename to the string s1="CAR1837_Ch1_"; //Assign wavelenth (could be a cycle) al=0.340; //put in to the memory string s2 for the filename s2 = new char[60]; ... |
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Hi all, I have to debug a hardware that comunicate with the computer through a USB conection. I know that the harware present some problem when the driver send some type of command to it. I'll like to discover what command is causing the hardware to crash. How can I intercept the comunication via USB between this hardware and the PC ... |
I'm wondering if someone could point me to the flaw in the following code that uses the while(!FP.eof()) condition to read the input data. This condition is reading the last data point of the file twice. #include #include using namespace std; int main(int argc, char **argv) { double x; ifstream FP("test.d"); //while(!FP.eof()){FP >x; cout << x << endl;} // ... |
I have a datafile which has a form of 10.10 10.20 10.30 ... 20.10 20.20 20.30 ... 30.10 30.20 30.30 ... .. . . .. . . .. . . it has 500 rows and 10002 colums. I tried to read the whole data in a single variable. My pc shows error. (Windows XP, notebook) All I need is to read ... |
Hello,... I am new in c programming and I have to do some data analysis of some files where I have a header a 5 columns of data. I want to reads the file, delete the wrong lines and wrong lines and save it in a new file. e.g. header2 data start at 00:00:00 09-09-07 10000 2000e-4 20000e-4 2000e-4 20000e-4 .............. ... |
Hi everybody, Please can you tell me how can I read large data file (> 15 millions line) in C/C++ languge. Thanks for your help, Claire You can use vectors for this: 1. declare/open a file-stream for reading (using std::ifstream ) 2. declare a vector of strings (std::vector) 3. if you haven't already reached the end of file, then do the ... |
Obviously, you are ujsing C++. So, read your integers one-by-one and insert them in a prority_queue container. When you read the container, the highest value in the container is what you get. The element is dropped by the container aafter you read it. If you go any other way, you will writing the C++ that's already been written for priority_queue. |
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About your flashing black screen. That was your program executing. You see, Visual Studio has two kinds of builds: a debug build where the .exe has code in it to run the debugger and a release build without that debugger code. The default is debug. Probably this is your case. Next, when you run tour program, you are selecting "Start" from ... |
Udhay wrote: I want to read the data of an audio file in c++ (Windows). What is the API which helps to read the data of an audio file. You need to include , and use 'std::ifstream' class, most likely. Open the file as binary. Use 'read' member function. I want to read BitRate,Audio Sample Size,Audio Sample rate and Channel I ... |
Originally posted by Burne C[color=blue] > "krishna_v" wrote in message news:3150950.1059105697@dbforums.- > comnews:3150950.1059105697@dbforums.com...[color=green] > > How to read data from files to structures(structure having[/color] > more[color=green] > > elements) > > Thanks in adavance > > -- > > Posted via[/color] > http://dbforums.com/http://dbforums.com > > If you write the structure to the file by yourself and you have to > read ... |
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Are you using C++? If so, and you are using the ifstream class to read from the file, you can use the .ignore() function. Since you know all your values are separated by commas, you can 1st read in the value (in your example integers) and then use .ignore(1) to skip the next character (the comma). If there are spaces in ... |
Hello everyone, first post, very very very noob, and yes its a uni homework thing. My question is how does one read from a given text file strcutured like this: Name, ID, Cost, productNumber, tax, TelephoneNumber And then use read in data (which i put into a char array) to convert to string, int or anyother data type? The deal is ... |
akang2005@gmail.com When I write 'double' data to the file, it seems working fine, but when I read it later, it returns a eof when it encounters a particular number even the file is not at the end yet. However, while I write a different set of data, there is no problem to read it. Attached is the file: try change the ... |
In article <1132943991.591061.142130@g44g2000cwa.googlegroups .com>, sudhir wrote:[color=blue] >I made a application which takes input entries of different products >and store them in file using ios library.. Now I want to show the >complete information of all products one by one using scrolling. Could >u help me to do so.[/color] The C language itself only knows as much about user interfaces as ... |
This may very well be completely off track but it's what came to my head. However, when I compile and run this, after i enter the file name, it doesn't do anything. What I want to do here is, if the users entered number is equal to the first number in the row, it scans the next two numbers. The third ... |
Hello All, I'm a complete newbie in C programming and am learning bits and pieces from online tutorials. I am trying to read some information from a text file, i have broken down reading this information from this file into 4 tasks. 1) Read gain values i.e. variables with single values 2) Read variables with a number of values or array ... |
Hi, I need help with this C code. basically I'm trying to read a data file that I dont know the number of data, so I am trying to count the number of data and row and trying to create a multidimensional array to store the data. The problem is when I create the array with the number of column and ... |
Hi, I need help with this C code. basically I'm trying to read a data file that I dont know the number of data, so I am trying to count the number of data and row and trying to create a multidimensional array to store the data. The problem is when I create the array with the number of column and ... |
There has to be *some* format there or no other program would ever read it... Generally there are only 3 ways data is written to a file... 1) Records ... using Structs that are simply dumped onto disk and read back later (binary mode) 2) Delimited... values separated by comas or some other convenient delimiter. 3) Sized ... where the size ... |
Hi, I am completely new to c programming and absolutely know nothing about it. However, I work in datastage and it accepts c code hence I have to write a program that would read cobol data files in ebcdic, COMP-3 with hex values stored in it. I would want to read and output(just print) the records in ascii. using a copy ... |
Im have trouble reading a file till its the end of a file using I/O redirection with my Quincy 2005 compiler. My first while loop is supposed to do this and i dont know how to start it. Can someone please help me. Code: #include int main (void) { int sampleID; int i, j; double num_of_genes; int length_exon; int intron; int ... |
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#include #include #include int stats(int data[], int b); int main(void){ char fileName[100]; int data[100]; FILE* sp; int k = 0; int b=0; int i; printf("Enter File : "); scanf("%s",fileName); printf("%s\n",fileName); sp = fopen(fileName,"r"); for(i= 0; i<10; i++){ while(k=(fscanf(sp,"%i",&data[i]) == 1)){array still not filling up printf("%10i\n",*data); b += k++ ;// b is number of values read into data[] } } for(i=0;i<10;i++) printf("%i",data[i]); ... |
Hi, I am new to C programming. I want to read the whole data from a text file. Can anybody tell me the code/syntax for following steps in sequence: 1) Open a text file. 1) Read the data from a text file. 3) If successfully read, then check the size of the data read (means number of characters read from the ... |
Hello, I have a rather simple program, which reads a string from file and stores it in a char array. While reading the file, each line is saved in the array properly, but when I exit the loop and print the array again, it prints only the last entry. There is probably something silly that I have not taken into account, ... |
And it's not an easy thing to do with plain C. There are some tools like bison, that help you parse an expression. That means separate an expression. 1)If you want to evaluate ANY expression than you need a lot of work. If you want to evaluate an expression without parenthesis then it might be simpler. Like you can read one ... |
Hi all, I have a problem with fscanf and I cannot find a clear solution to what I'm doing wrong... I have a large amount of data to read (around 110,000 lines) in the format od "DATE, TIME, VALUE" and the (first) thing I want to do is to store each of the 24 columns into arrays of strings and floating ... |
Hi, im stuck with this part of the program where I have to read all the data from a file (structure by structure) and display it in the list. The way I approched this is by first finding the total number of structures in the file, then looping through all of them with a FOR loop, reading the values of each ... |
Hi, I have a little experience with C but I am having problems with a particular data file. This file contains 3700+ entries which are split into 14 columns of mixed integer and floating point numbers. The main problem with the file is that not all of the columns contain data. This has given me endless problems since I would like ... |
I have a file with numbers that I need for calculations and want to open the file, read the data and put the data in specific variables. The file has non-zero values, but my program just outputs zeros . . . please help! The text file will look like this: Params 1 2 3 4 5 6,7 Data 1,1 2,2 3,2 ... |
Code: #include int main() { float G, vi, B, t, duration[], burnrate[]; int mi, ve, D, S; FILE *inFile, *outFile; inFile = fopen("LAND2.txt", "r"); if (inFile == NULL) { printf("\nFailed to open the file.\n"); exit (1); } if (inFile != NULL) { printf("\nThe file LAND2.txt was opened successfully."); } while (fscanf(inFile, "%f", . . . ) fscanf (inFile, "Params \n"); ... |
I'm new to c, and i've been given a project that requires me to read in data from files of varying length. i then put the data into an array and use it in some calculations. basically im having trouble with how to make the program realise these .txt files have different amounts of data in them and scan in only ... |
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Hey everyone, I have got a problem with reading data from a file and use it during the process of the program. I have a program that controls an interface card and that is working fine. At this moment I configure the settings in the code, but what I want is the possibility to set the configuration of the interface by ... |
Please Help Reading Data From A File Hi everybody, I have an input file called cond.inp The file contains data in the form as follows: Number:1 Species: first Concentration: 1.0e14 Density: 4.00 Molecular Weight: 1.0 Production Rate: 1.0 Saturation Vapor Pressure of material in the form Ps=exp(C-D/T)P: C=1.0 D=1.0 Surface Tension in the form A-BT(dyne/cm): A=1.0 B=0.0 Number:2 Species: second Concentration: ... |
Hello, first post here so i hope i don't break any rules. I need to read some data from several consecutively named data files. The thing is a) the data files are gonna be named something like: datafile0001.asc, datafile0002.asc, etc, that is the way they're named and b) they will have random names, say one set will start with 820nm500mw0001.asc , ... |
You can't. FILE pointers just work with streams. To C, the file just looks like one long line of bytes. However, lines are separated by newlines ('\n') and fgets() picks up on that. So the first call to fgets() after opening the file will read all the characters up until it reaches a '\n' character. The next call to fgets() reads ... |
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I have a text file with the following lines: 1 | Matrix | 1 | Action | 3 2 | X-men 2 | 1 | Action | 2 . . . id | movie name | rental type | genre | stock I want to read the data from the text file and store 1 into an id variable, Matrix into ... |
I am new c-programming student in TARC...I'm having troubles in my C code in my assignment..hopefully someone can help me out... My assignment is about write the main program to allow users access into the main menu after they key in their user ID and correct password. After three unsuccessful attempts(i.e wrong password) the program exits. the password and userID are ... |
Im a c programming rookie, and i could use some help with writing a data file, reading that file, and manipulating that data. I guess the best way to help explain this is to make up a simple sample problem. Lets say your a water billing company with three customers, you charge 10cents per gallon of water if the customer uses ... |
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Another variation is to use the following, good for counting the number of variable size records, each terminated by a new line character, on a text file. <-- snip code --> the fscanf will read the data up to the new line character and the next "\n" takes reads the newline at the end of the record. |
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FILE *fp; char file[20]; int nr, *existent, *processes,i; int main(){ puts("Enter the name of the input file. "); scanf("%s", file); //Here's the first problem, check the return value of scanf //if(fp=fopen(file,"w")!=NULL){ //why not break it down to simple steps. fp=fopen(file,"w"); if(fp!=NULL) { while(!EOF){ //Here is the problem fscanf(fp,"%d",&nr); puts ("Reading from file") ; } } else printf("File %s not found or ... |
In addition to no result checking, you have no error recovery either. Code: char buff[BUFSIZ]; // read a whole line into a buffer. If the line is broken // then the input stream is at least still in a useful state. while ( fgets( buff, sizeof(buff), ifp ) != NULL ) { int termm, idd, tempp; char lastN[BUFSIZ]; // no overflow ... |
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void readFile(IRecord r[]) { char filename[80]; //filename for loading inventory data int x = 0; FILE *pFile; printf("\nFilename to load? "); scanf("%s", &filename); if ( (pFile = fopen(filename, "rb") ) == NULL) { printf("File could not be opened.\n\n"); } else { fread( &r, sizeof(r), 1, pFile ); while ( !feof( pFile ) ) { if(r[x].iNbr != 0) { printf("%p\n\n", r[x].iNbr); } ... |
I don't know why you're failing to understand it, given the example in post 4. No one says you have to hard code any part of it. Get the strings however you like. From the user. From the ball my grandson collects. Put them together. Don't make something special from the word, "append". It means "tack onto the end". As you ... |
I tried to program a simple program with 1D array with no substring. when i have a input folder tom john tommy anna rocky toby jill jack sam danny katie roy i have to print out in alphabet order on each row but when i just try to read in the name and print out the name it doesn't work at ... |
suppose there are 2 lines in a file .I have to read them and find the diff between the lines like (2-1) and (3-2 ) input.txt --------- 1 2 3 In the program i find diffcult to store 2 values in the loop. void main() { FILE *fp; static char ch; char ln[100], fp=fopen("input.txt","r"); if (fp==NULL) { printf ("\n File does ... |
lets say i have a class which have these attributes class database Name Id number Account Id and in my text file i have the data of 2 person like this: John 123456 234121 Doe 12256 12121 How do you, by just reading the file 1 time create 2 ... |
I have to construct a program that allows for concurrent reads and writes to a database. It is supposed to access the metadata file and pass as a parameter to load the database. I can't remember how to make a data file to be read by the program. Are you just supposed to use one space between each field. For example, ... |
I suggest you either use C++ iostream classes or use the actual FILE pointers. The CStdioFile class is doing very little for you and only obscures what is really happening. Look up fseek and ftell to get the size of the file, then use rewind to get back to the begining, then malloc a block of memory the same size as ... |
Hello... I need to read from a data file and then do use the data for computations. I cannot figure out a way to extract the data. This is what the file looks like(of course, the comments are not in the file): AB111 //its the ID 34 12 22 4.6 33 67 2.3 . -1 -1 -1 //end of data block ... |
his is a follow up to the question I asked earlier and with the help of some people here I was able to start up with the function I want to write,but I am yet to complete it. Here is my earlier question: I have a series of files with the extension (.msr), they contain measured numerical values of more that ... |
#include #include #include typedef struct { int code; char name; float amount; int shares; float c_price; }DATA; typedef struct stockList { DATA stock; stockList* link; }STOCK; STOCK* insertStock(STOCK* pList, STOCK* pPre, DATA item); STOCK* buildList(char* fileID); void printList(STOCK* pList); void fprintList(STOCK* pList); bool searchList(STOCK* pList, STOCK** pPre, STOCK** pCur, int target); void modifyList(STOCK* pList,int pre_code, int code, char ... |
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Hi! I'm just starting to code in C, and I'm trying to read the information in a dat file, to then use it in some calculations. I read the information in the file and then save it in an array. However when I try later to access that array I only get zeros. I've checked that the code is indeed reading ... |
Hi, I have some text file like with following structure (also attached). I want to extract only data in the form of an array: ------------------------------------------ 2048 52 429 425 398 200.000000 0 638 940 921 906 25 26 27 25 61 4096 213 1116 1371 398 200.000000 --------------------------------------------- Could you please suggest me some code in C which could help me? ... |
The first parameter to fread() must be a pointer. What you are attempting to pass is an integer. Use the pointer & operator and it should fix that. That is inteded to read the binary version of an integer, not the text version. If the file is a text file (that is, a file that is easily readable by Notepad.exe or ... |
#include int main(void) { char input[150][350]; char line[350]; int i,j=0; double num[1000]; /*But i don't Know the exact num*/ FILE *get_input; get_input=fopen("input.inp","r"); if (get_input!=NULL) { while (fgets(line,sizeof line,get_input)!=NULL) { strcpy(input[i],line); printf("My Inputs%s\n",input[i]); i++; } } else { perror("File cannot be found"); } i=0; while (line[i]!=EOF) { sscanf(input[i],"%f",&num[i]); printf("My Numeric Array%f",num[i]); /*Only print text and zeros finally because of array size ... |
rm_num = section.room_connec.room_num; fseek ( roomPtr, ( rm_num - 1 ) * sizeof( ROOM_DATA ), SEEK_SET ); fread ( &room, sizeof( ROOM_DATA ), 1, roomPtr ); // Writes to guest_history file fseek( logger, ( NULL ) * sizeof( ADMISSION_DATA ), SEEK_SET ); // &&&&&&&& END fread( §ion, sizeof ( ADMISSION_DATA ), 1, logger ); section.cancel = 1; // 1 = reservation ... |
well... the first 5 lines are okay... on line 5 you fget the first line of the file and put it into the string "line"... that's fine too but then on line 7, you start checking the string "readline" where does this come from? you should be checking the string "line", i think... so you want to check if the first ... |
Dear all; I have problem in reading data file in C. I have data like this: 00:00:00 R- 0.0654 345 +19 00:01:00 R+ 1.5678 324 +19 00:02:00 2.3456 315 +19 00:03:00 R- 1.2352 324 +19 ........................ next until 1440 lines What i want is only the data in third column, but as we see in second column sometimes is empty. I ... |
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#include #include #include #include #include #define EOL '\n' #define N 100 void OpenFile(void); void ReadFile(void); void ConvData(void); char data[N]; FILE *dataptr; unsigned int i,ii; char *data2=malloc(strlen(data)); long k; main() { clrscr(); OpenFile(); if (dataptr!=0) { ReadFile(); printf("read\n"); fclose(dataptr); } { ConvData(); } return 0; } void OpenFile(void) { dataptr=fopen("data.dat","r"); if (dataptr==0){ printf("ERROR - Cannot open the ... |
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