C Programs

All a program is is just a set of individual function definitions. Function definitions do NOT have to be in the same file.

Compiling

Again, its architecture dependant.

GCC

gcc file1.c file2.c file3.c and they will all compile to a.out or gcc -o myprogram file1.c file2.c file3.c

Example

//programfir.c
#include <stdio.h>
 
 
int main(){
    int mygotten = getnum();
    printf("%d",mygotten);
    return 0;
}

//programsec.c
int getnum(){
    return 20;
}

gcc -o programtest programsec.c programfir.c this will give an error, but running the program should print 20