依旧模仿


#include <stdio.h>

#include <stdlib.h>

int main()

{

    int week;

    scanf("%d",&week);

    switch(week)

    {

        case 0:printf("sunday\n");break;

        case 1:printf("monday\n");break;

        case 2:printf("tuesday\n");break;

        case 3:printf("wednesday\n");break;

        case 4:printf("thursday\n");break;

        case 5:printf("friday\n");break;

        case 6:printf("saturday\n");break;

        default:printf("error\n");

    }

    return 0;

}

#include <stdio.h>

#include <stdlib.h>

int main()

{

    float a,b;

    char c;

    printf("please enter a,b and op:");

    scanf("%f%c%f",&a,&c,&b);

    switch(c)

    {

        case '+':printf("%f+%f=%f\n",a,b,a+b);break;

        case '-':printf("%f-%f=%f\n",a,b,a-b);break;

        case '*':printf("%f*%f=%f\n",a,b,a*b);break;

        case '/':if(b!=0.0)

                  {

                      printf("%f/%f=5f\n",a,b,a/b);break;

                  }

        default:printf("error");

    }

    return 0;

}