I’m trying to read a file and fill an array with all the characters in the file. The problem is that in the while cycle the execution stops and there is a segmentation fault error. This is the interested function: void allocAndFillArray(char **arrayChar, FILE *file) { // *file is checked before the function and //… Read More Why is calloc function not allocating the array?
I want to repeat a string – for example hello – for a specific number of imes – for example 3 times -, but it doesnt work 🙂 The example should look like this: hellohellohello, but I get no output or i get HHHHHHHHHHH… here is my code: char *repeat_str(size_t count, char *src) { int… Read More C – repeat a string for a specific number of times in anothervariable
I defined an array and I tried to resize using realloc() but it is not working. My question is can I do that using arr[] or do I have to use calloc() or malloc() first to define the array and then use realloc()? this is my working so far… #include <stdio.h> #include <stdlib.h> void printArray… Read More resizing an existing array using `realloc`
What’s better/more efficient – calloc or malloc? I want to initialise structs, that refer to other instances of the same struct also VARIANT 1 person *new_person() { struct _person *person = calloc(1, sizeof(person)); person->name = NULL; person->child = NULL; return person; } VARIANT 2 person *new_person() { struct _person *person = malloc(sizeof(person)); person->name = NULL;… Read More When to use calloc or malloc in C
I can’t run the code because it gives the error mentioned in the title, but I declared it in main. I’m stuck for a few hours and I can’t solve this main.c , here is where I declare the "listaCliente" int main() { Cliente* listaCliente = lerBaseDeDados(); menuPrincipal(listaCliente); } Cliente.c // menu , basically this… Read More Error 'listaCliente' undeclared (first use in this function)
let’s say I have a char* ./a.out\0a\0b\0\0. I want to split it and the result to be a char** of value { "./a.out\0", "a\0", "b\0", "\0" } I’m using pure c + POSIX but if an answer contains parts of the c++STL I don’t mind that, just avoid the memory inefficient ones like std::string >Solution… Read More splitting a string using '\0'
can someone tell me how to use realloc to properly extend calloc? my expectation: all 20slots to have value of 0. Outcome: only calloc slots have value of 0, the one I allocate with realloc have random number. output picture #include <stdio.h> #include <stdlib.h> int main(){ int *ptr; int i; int n =10; ptr =… Read More How to properly realloc a calloc?