#include "stdio.h"
#include <math.h>
#include <iostream>
int main(void)
{
    int a;
    printf("please input interger number:\n");
    scanf("%c",&a);
    switch(a)
    {
             case 1 :printf("Monday\n");break;
             case 2 :printf("Tuesday\n");break;
             case 'c' :printf("Wednesday\n");break;
             case 4 :printf("Thursday\n");break;
             case 5 :printf("Friday\n");break;
             case 6 :printf("Saturday\n");break;
             case 7 :printf("Sunday\n");break;
             default:printf("error\n");
    }
    system("pause");
    return 0;
}

这个程序我输入c时，输出是error
但是我把int a;改为int a =0后，输出就是Wednesday了，这是什么原因

我想知道为什么

厉害
#include "stdio.h"
#include <math.h>
#include <iostream>
int main(void)
{
    int a=256;
    printf("please input interger number:\n");
    scanf("%c",&a);
    switch(a)
    {
             case 1 :printf("Monday\n");break;
             case 2 :printf("Tuesday\n");break;
             case 'c' :printf("Wednesday\n");break;
             case 4 :printf("Thursday\n");break;
             case 5 :printf("Friday\n");break;
             case 6 :printf("Saturday\n");break;
             case 7 :printf("Sunday\n");break;
             default:printf("error\n");
    }
    system("pause");
    return 0;
}
当a是255就可以，256就不行了，和你说的一样

还是谢谢