Where does the main function return the value in C programming language?

Answer 1

To fulfill the purpose I don't use return but use a different method. pass by references:

#include<stdio.h>

void myFunc(int n[]){

int i;

for(i = 0; i<10; i++)

n[i] = i;

}

int main(void){

int a[10];

int i;

myFunc(a);

for(i=0; i<10; i++){

printf("%d\n",a[i]);

}

}

Answer 2

Nothing special, but never return local (automatic) variables.

bad example:

char *fun (void) {

char local [32];

return local;

}

good example:

char *fun (void) {

char *local= malloc (32);

return local;

}

/* warn the caller that they have to free the memory */

Answer 3

The main function returns its result at the end of the function body. It is bad practice to sprinkle "return" statements within the function body, and other methods of exiting a C program (e.g. use of longjmp and exit) also make it harder to debug.

An application A's main function's result is returned to the caller, which resides in process B. B is the process which launched application A. For example, if A was a simple console tool, B could be the console window (cmd.exe in a Windows operating system). B could also be a suitable file explorer, or pretty much any other type of process.

The calling process B typically examines A's return code. By convention, a return code of 0 (zero) indicates success without errors (zero errors). A non-zero return code typically indicates completion with at least one error, and the value of the return value can give clues into the nature of the error. The non-zero result codes (sometimes also called error levels) are not generally standardized though.

Answer 4

In C you would simply return a char pointer to the start of the array. In C++ you can still do that but it's better to return a vector instead.