Sorna C Program Example

main.c

#include <stdio.h>
#include "mylib.h"

int main() {
    // library function in different source file
    int v = getvalue();
    printf("myvalue is %d\n", v);
    
    // interactive user input with scanf()
    char name[1024];
    printf("your name? ");
    fflush(stdout);
    scanf("%s", name);
    printf("hello, %s!\n", name);
    
    return 0;
}

mylib.c

#include "mylib.h"

int getvalue() {
    return 42;
}

mylib.h

int getvalue(void);