5_8.cpp

C程序参考,简单易懂,是初学者不可少的参考资料

#include<stdio.h>
main()
 {
     float a,b;
     char op;
     printf("Please enter a,b and op:");
     scanf("%f%c%f",&a,&op,&b);
     switch(op)
     {
         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=%f\n",a,b,a/b);
             else
                 printf("Division by zero,ERROR!\n");
             break;
         default:
             printf("Operater ERROR! again please!\n");
             break;
     }
}