I would like to know if there is any way to return an char array.
I tried something like this "char[] fun()" but I am getting error.
I don't want a pointer solution.
Thanks!
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what is the difference between following function declarations, which create and return the array in C/C++? Both methods create the array and fill it with proper values and returns true if ... |
The subroutine Rule_Tn in the Fortran library CUBPACK needs a parameter Integrand describing the integrated vector function. It's a
INTERFACE
FUNCTION Integrand(NF,X) RESULT(Value)
USE ...
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I already did the hard part of adding a system call to the linux kernel. I need to return the following array:
unsigned int counts[4]
I can reference the array ... |
I've a table created like:
CREATE TABLE tbl_test
(
id bigserial PRIMARY KEY,
interest int ... |
I encountered another problem during my nasm homework and decided to share it here to get a little help.
Currently, I have a function in C, which sends two strings to assembly, ... |
Why is this valid in C
int * foo(int a,int b){
...
}
but this is invalid
int [] foo(int a,int b){
...
}
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If we have an array[5], we know that arr == &arr[0]
but what is &arr[2] = ?
Also, what does &arr return to us?
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I'm just wondering why
CREATE TABLE employeeinfo(
position CHAR(50),
salary INT NOT NULL,
branch CHAR(50)
) ENGINE=InnoDB;
SELECT * FROM EMPLOYEEINFO
WHERE position >= 'Regional Manager';
is returning every person in the ... |
1) Dont declare big memory on stack i.e. local variable (mutation in the above example). 2)Use malloc to allocate the memory for result. And directly add to that memory instead of adding to first mutation then re return. 3) Even if you want to use the mutation. In the last simply assignment operator will not work. You will have to copy ... |
the error message is: error: incompatible types in assignment of `float*' to `float[4] basically, I thought that the variable axis was a pointer to an array, and since v3 is also a pointer to an array of the same size I thought they would be interchangeable. But apparently not. I'm not quite sure how to fix this. |
Hi, I have this code which takes in a file, reads it in as a binary array, and prints the array. Is there anyway I can write a code which would print the number of binary values taken and printed? like a counter? So basically if a file consists of 10529 bits... I want it to print that value also. Any ... |
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The output is: 1234 After getline: 1234 After renew: 1234 After retnp: G After getp: G -----What happen after renew/retnp call?------- Why not return a true array? -----The code is as followed------------------- #include #include #include void print(char *,const char *); void renew(char *); void retnp(char *); char* getp(char *); int main(int argc, char* argv[]) { char *p = ... |
#include "constants.h"#include float *StudentAverage(int input[NUMBERofSTUDENTS][PGMSCORES]) { int i, j, sum=0; static float *SAverages[NUMBERofSTUDENTS]; for(i=0; i < NUMBERofSTUDENTS; i++) { for(j=0; j < PGMSCORES; j++) { sum+= input[i][j]; } SAverages[i] = (sum / PGMSCORES); sum = 0; } return SAverages; } float *ProgramAverage(int input[NUMBERofSTUDENTS][PGMSCORES]) { int i, j, sum=0; static float *PAverages[PGMSCORES]; for(i=0; i< PGMSCORES; i++) { for(j=0; j< NUMBERofSTUDENTS; j++) ... |
Tell you what... Turn off your computer, set yourself down with a good old fashioned pencil and paper and THINK about the problem... what do you have? what is being asked? what does it entail? etc. until you understand it well enough to describe it in minute detail. Now that you understand the problem... plan out how to solve it using ... |
Hello, I am new to this forum and have already some experience in C, but have now come to a point where I am no longer sure. For my question I use a GTK function as an example, it should be no problem to understand though. OK, my question is, there are functions that return a newly-allocated NULL-terminated array of strings. ... |
func2try (int arr []){ int foo [6] = {}; return foo } in main : arraymo[2] = {}; arraymo = func2try ( arr ); <--wont work, it seem that no option to return to main and still be able to work with [] format, only pointer format , which means that you only see the first ... |
Hi everyone! I've got a seemingly simple project for school in which we have command line tool that needs to add two large integers that get passed to me as arrays. NO LIBRARY FUNCTIONS ALLOWED! No malloc, nothing! I've run into a problem when i need perform a carry operation on the final digit (the highest order digit) because there is ... |
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#include #include char* teste(char* s) { char *tok = (char *)malloc(3); char *p; int i; p=(char *)strtok(s," "); for (i = 0; p && i < 3; i++) { tok[i] = *p; p = (char *)strtok(NULL," "); } /*if (i < 3) { fprintf(stderr,"Parametros em falta\n"); return -1;*/ return tok; } int main() { char op[]="p 1 2"; //teste(op); char *comando=teste(op); ... |
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Hi all, please correct me if i make a stupid statement.... I know/think i know its not possible to explicitly return an array within C. However i am undert the impression that it is possible to do so using pointers. Ive had a read of various tutorials but none of which really have helped me in what im trying to do. ... |
The problem of yours is simple. You just misunderstood the difference between and numbers[10] defined string and a char * defined string. s points and adress right. But you can not assign that to an empty string adress,coz numbers keeps an adress that points a 10 charactered string.So you should change you numbercon function like this: return &numbers[0]; |
Hi, I'm new to C but have some experience in java and I'm wanting to return an array. As I understand it so far you have to return a pointer instead and use that. But I get odd results as if it were pointing at the wrong memory location after I have returned the pointer. Basically, it gets an array, processes ... |
27. Return array cboard.cprogramming.com |
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The name of an array is just a pointer to the array, cell zero. You cannot return an array any other way in C other than by pointer. Keep in mind that you cannot dynamicly create "arrays". You can allocate consecutive blocks of memory, which you can treat an array, but you don't actually do: int array[][] = new array[x][y]; Also ... |
#include "strili.h" char *liste(char zeich) { static char *striche[10]; int z, l, i; if (isdigit(zeich)) { z = zeich - '0'; l = 0; if (striche[z] != NULL) { l = strlen(striche[z]); free(striche[z]); } if ( (striche[z] = ((char*)malloc(l+2))) == NULL) { printf(".......Speicherplatzmangel\n"); return(*striche); } for (i=0; i<=l; i++) striche[z][i] = '|'; striche[z][l+1] = '\0'; } return(*striche); } |
This is for a project using C. I am using a gcc compiler. I am supposed to write funcions that dynamically allocate a 1d array, but treat it as a 2d array. I have to take two parameters which are the number of rows and colums of the array you will be emulating. It returns a pointer to the data structure ... |
You don't need to cast the return of malloc since the pointer it returns is implicitly convertible to any type of pointer. Also, the sizeof portion can be expressed in a more adaptive way, should you decide to change the element type in future. int **combi = malloc (numOfCombis * combiSize * sizeof (**combi)); |
Pointers are not arrays. rnd_array in your function is a pointer, as is the return value of that function in main(). sizeof(any_pointer) returns the size of the pointer. Allocating that pointer to be the address of the first element of any dynamically allocated array (eg from operator new_ does not change that fact. On a typical 32-bit operating system, sizeof(almost_any_pointer) will ... |
Well i want to return an array from my function. I understand that you cant actually return an array, but a pointer to an array after assigning memory or something. Im confused however and any time i try to modify my already written code to allow me return a pointer to an array i get errors relating to the fact "that ... |
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Since you declared the array inside of the function, it will go out of scope when the function returns and then the OS or your program will be able to use that space again. This means that the address that your function returns will be pointing off somewhere where there is indeterminent data. It's possible that your array data could still ... |
I will be comparing j to zero but I don't have to the first and second results are right this tells me that the problem happens after. Right? when it begins at zero I get the right number which is THe values of the aRRAAY SQUARED ARE 90000.00, arrayxorY THe values of the aRRAAY SQUARED ARE 160000.00, arrayxorY And the second ... |
Hi. Wow, 6 months later I still have an account here....haven't been here for at least 6 months I have a program finished but it isn't going as fast as I'd like. I am a beginner at this stuff so bare with me. My program tallies numbers from a one set of an array inputs them into another. abc[10]={5, 4, 2 ... |
I'd say "put it in the header file of the class", but it has been months that I did my last piece of C++ code. You have to declare it a "friend" to the class somewhere too (don't ask me where ). Maybe make a new thread about the problem "where to put operator overloading functions and how to implement them ... |
I need a function that will return the contents of a directory in an array. I know that this has been covered several times on the boards but I am a newbie and still have questions. I am going to focus on this posting: URL 1) Can someone explain: struct dirent *dptr; struct stat st; The only struct declarations I have ... |
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You can try casting your return value to (int **) and see what happens. C++ does not like missmatched variables, and looking at your error, I think you declared the variable like this: 'int *val[5];'. If you had declared your variable as 'int **val;' and done your own memory allocation for the second dimension, you probably wouldn't get the error. |
Ok, this is weird, if I have a printf() before return buff; <-- the array of chars I want to return, then it prints out the right word, otherwise it prints out some invalid charecters.. This is the function and how I use it, it has 1 bug I see, is that if the charecter (ccccc) doesn't appear again it doesn't ... |
C++ I want to send an array to a function, do something with it inside, and then return it. Then later send it to another function and return it and so on. How do I do this? Its easy with a regular int or something, but I cant get it to work with arrays. The array looks like this int f[26]. ... |
#include void alloc_char(char **cp) { *cp = (char *)malloc(sizeof(char)); } int main(int argc, char *argv[]) { char *my_char; /* We pass the address of the pointer so that we can modify the original copy! */ alloc_char(&my_char); // &my_char is a char ** /* Don't forget to free! */ free(my_char); return 0; } |
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#include #include #include int main() { int *bpt = bob(); int i; for (i = 0; i<9;i++) { printf( "bPtr[%d] = %d\n",i,*(bpt+i)); } free(bpt); } //end of main() int *bob() { int i; int num[9]; for (i = 0; i<9; i++) { num[i] = i+1; printf("%d ",num[i]); } printf("\n"); int *bPtr = num; for (i = 0; i<9;i++) ... |
dear friend this code doesnot work if suppose 6&4 are missing and two 5s are present then this code would say the array doesnot contain duplicate element .... so the code will not work instead u can try this logic: scan the array sequentially and on finding a number say n store it in a variable and replace the no by ... |
To Kalachylde: It does not perform what we are expected to because of two reasons: it will return integer instead of array of integer, and return graph[6][6] means creating one new array of integer with size 6X6 without initialization. To Dave Sinkula: I think although the local data goes out of scope, we still get the correct result because the local ... |