try yourself |run program

#include <stdio.h>
#include <conio.h>

void f1(int m, int n){ 
 printf("\n value of m = %d",m);
 printf("\n value of n = %d",n);
}

void main(){
 clrscr();
 f1(100,200);
 getch();
}

Program Output

value of m = 100
value of n = 200