c语言 8-1

c语言 8-1

1、

#include <stdio.h>

#define diff(x, y) ((x) - (y))

int main(void)
{
    int a, b;
    puts("please input two integers.");
    printf("a = "); scanf("%d", &a);
    printf("b = "); scanf("%d", &b);
    printf("diff result: %d\n", diff(a, b));
    
    double m, n;
    puts("please input two doubles.");
    printf("m = "); scanf("%lf", &m);
    printf("n = "); scanf("%lf", &n);
    printf("diff result: %f\n", diff(m, n));
    
    return 0;
}

 

 

2、

#include <stdio.h>

#define diff(x, y)  ((x > y) ? (x - y) : (y - x))

int main(void)
{
    int a, b;
    puts("please input two integers.");
    printf("a = "); scanf("%d", &a);
    printf("b = "); scanf("%d", &b);
    printf("result: %d\n", diff(a, b));
    
    double m, n;
    puts("please input two doubles.");
    printf("m = "); scanf("%lf", &m);
    printf("n = "); scanf("%lf", &n);
    printf("result: %f\n", diff(m, n));
    
    return 0;
}