程序代码：

#include<stdio.h>
void input(int x, int y)
{
    int n = 0;
    while (n == 0)
    {
        printf("Input the number a and the number b:\n");
        scanf_s("%d%d", &x, &y);
        if (x != y)
            n = 1;
    }
}

int max(int x, int y)
{
    return(x > y ? x : y);
}

void print(int x)
{
    printf("The Max is %d\n", x);
}

int main()
{
    void input(int x, int y);
    int max(int x, int y);
    void print(int x);
    int a, b;
    input(a, b);
    print(max(a, b));
    return 0;
}