c语言中分支结构程序 switch语句的经典用法

#include <stdio.h>

int main(void)
{
    int i;
    puts("please input an integer.");
    printf("i = "); scanf("%d", &i);
    
    switch(i % 3)
    {
        case 0: puts("remainder: 0"); break;
        case 1: puts("remainder: 1"); break;
        case 2: puts("remainder: 2"); break;
    }
    return 0;
}

#include <stdio.h>

int main(void)
{
    int i;
    puts("please input an integer.");
    printf("i = "); scanf("%d", &i);
    
    switch (i % 3)
    {
        case 1: puts("remainder: 1"); break;
        case 2: puts("remainder: 2"); break;
        default: puts("remainder: 0"); break;
    }
    return 0;
}