see this example:
int *array = malloc (10 * sizeof(int))
Then free only the first 3 blocks?
Or make equal java, have an array with negative index, or an index that not ... |
#include <stdio.h>
#include <stdlib.h>
int main()
{
int *numeros = malloc(sizeof(int) * 3 * 3);
numeros[900] = 10;
printf("%d", numeros[900]);
free(numeros);
...
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So C99 blessed the commonly-used "flexible array member" hack to allow us to make structs that could be overallocated to suit our size requirements. I suspect it's perfectly safe on most ... |
I have an array that's declared as char buff[8]. That should only be 8 bytes, but looking as the assembly and testing the code, I get a segmentation fault when I ... |
I'll be most thankful if someone could help me with the following: 1. A double array is declared and allocated in an object's constructor class Snapshot { private: double **Coord; // The atoms coordinates . . . 2. this array should be accessed via double Snapshot::GetCoor() { return Coord; } 3. The array should than be passed from within its object ... |
hi, I'm writing a program a kind of calculator that should work with very big numbers (thousand of digits). So, numbers are rappresented by a struct that contains a pointer to integer, e 2 int for dimension of the array e number of digits. the pointer is than used for the malloc of the array... my 2 problems are: 1)some time, ... |
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Hi ALL, I have a doubt regarding declaration of static variable. Suppose if we declare a char array as static then when the memory reserved for the elements of the array will be de allocated .For example when the memory reserved for "array[10]" will be de allocated ? #include char *return_static(); int main(void) { char *received = NULL; received = return_static(); ... |
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You're overwriting your file handle with your call to calloc(). Presumably you wanted to assign the result of calloc() to another pointer, but I'm really not sure which. You have types all over the place: ZIPS_data_p_t, data_t, data_p_t... I don't know what they all mean. I can only guess that data_p_t is a typedef'd pointer (which I think is bad style ... |
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1. Don't cast the result of malloc in C, you're hiding potential errors. - if the complaint is along the lines of "initialization makes pointer from integer without a cast", then you didn't include stdlib.h - if the complaint is along the lines of "invalid conversion from `void*' to `double*'", then stop using a C++ compiler to compile your C code. ... |
#include #include #include #include #include typedef struct _oneLine { int ntoks; char *lns[]; }OneLine; typedef struct _codeArray { int argc; OneLine *args[]; }CodeArray; int main(int argc, char *argv[]) { int i=6; CodeArray *c = malloc(sizeof(CodeArray) + (sizeof(OneLine) + sizeof(char **) * 10) * 10); c->argc = i; fprintf(stderr,"value is : %d\n",c->argc); c->args[1]->ntoks = i; fprintf(stderr,"value is ... |
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I have 3 questions: 1. Is my allocation correct? 2. How can I do it with the function I gave and the struct? what should I return? How to allocate a memory to the struct itself and then its fields? 3. How do I free the memory allocated by this function? lets say by a function called void Free(array *free); |