How can i receive a string in a function returned by another function in C? is this process right?

Question

int main () {
char a[100], c[100];
//code ;
c [100] = function (ara);
}
void function (ara)
{
//code;
return ara;
}

Answer 1

If the function returns a string it must be heap allocated or return a string parameter, otherwise that string is local to the function and will be destroyed when the function exits. For heap allocated strings you'll need a char pointer to hold the returned value.

As an example:

char *new_string(const char *text)
{
char *s = malloc(strlen(text) + 1);
return s ? strcpy(s, text) : NULL;
}

In main():

char *s = new_string("The C Programming Language");
puts(s ? s : "Allocation failure");
free(s);

new_string() is doing what strdup() does on UNIX-based systems, it returns a mutable heap-allocated string and copies the string parameter into it. But you don't have to do it that way, you can pass a size and return an empty string with a few changes. It depends on what you want your function to do.