#include <stdio.h>

    void larger2(int * val1, int val2) {
        if (*val1<val2) *val1=val2;
    }

    void print2(int val1, int val2) {
        (void) printf("%d %d\n", val1, val2);
    }

    int larger1(int val1, int val2) {
        if (val1>val2) val1 = val2;
        return val1;
    }

    void main() {
        int I1, I2, I3;

        I1 = 4;
        I2 = 5;

        I3 = larger1(I1, I2);
        print2(I1,I2);

        larger2(&I1,I2);
        print2(I1,I2);
    }