我是名新手，下列程序哪里错误如何纠正，请大神赐教 - 编程论坛

#2

叶纤2020-04-07 18:09

程序代码：

7 8处错的，你自己找
#include <stdio.h>
int main()
{
    float num1,num2,result;
    char operate;

    printf("Please enter operator:");
    scanf("%c",&operate);
    printf("Please enter two numbers:");
    scanf("%f,%f",&num1,&num2);

    switch (operate)
    {
      case'+':
      result=num1+num2;
      printf("%5.2f+%5.2f=%5.2f",num1,num2,result);
      break;

      case'-':
      result=num1-num2;
      printf("%5.2f-%5.2f=%5.2f",num1,num2,result);
      break;

      case'*':
      result=num1*num2;
      printf("%5.2f*5.2f=%5.2f",num1,num2,result);
      break;

      case'/':
      if (num2!=0)
      {
          result=num1/num2;
          printf("%5.2f/%5.2f=%5.2f",num1,num2,result);
      }
      else
          printf("In a division operation, the divisor can not be zero");
      break;

      default:
      printf("The operator is invalid");
    }

}

[此贴子已经被作者于2020-4-7 19:29编辑过]

#3

x19211713312020-04-07 18:44

回复 2楼叶纤

谢谢

#4

天下天下2020-04-07 18:55

回复楼主 x1921171331 自己对比吧

#include <stdio.h>
int main(void)
{
    float num1,num2,result;
    char operate;

    printf("Please enter operator:");
    scanf("%c",&operate);
    printf("Please enter two numbers:");
    scanf("%f,%f",&num1,&num2);

    switch (operate)
    {
      case'+':
      result=num1+num2;
      printf("%5.2f+%5.2f=%5.2f",num1,num2,result);
      break;

      case'-':
      result=num1-num2;
      printf("%5.2f-%5.2f=%5.2f",num1,num2,result);
      break;

      case'*':
      result=num1*num2;
      printf("%5.2f*5.2f=%5.2f",num1,num2,result);
      break;

      case'/':
      if (num1 == 0)
      {
          result=num1/num2;
          printf("%5.2f/%5.2f=%5.2f",num1,num2,result);
      }
          else
          printf("In a division operation, the divisor can not be zero");
      break;

      default:
      printf("The operator is invalid");
    }

}

#5

x19211713312020-04-07 19:23

回复 4楼天下天下

谢谢

#6

叶纤2020-04-07 19:31

以下是引用天下天下在2020-4-7 18:55:00的发言：

#include <stdio.h>
int main(void)
{
    float num1,num2,result;
    char operate;

    printf("Please enter operator:");
    scanf("%c",&operate);
    printf("Please enter two numbers:");
    scanf("%f,%f",&num1,&num2);

    switch (operate)
    {
      case'+':
      result=num1+num2;
      printf("%5.2f+%5.2f=%5.2f",num1,num2,result);
      break;

      case'-':
      result=num1-num2;
      printf("%5.2f-%5.2f=%5.2f",num1,num2,result);
      break;

      case'*':
      result=num1*num2;
      printf("%5.2f*5.2f=%5.2f",num1,num2,result);
      break;

      case'/':
      if (num1 == 0)
      {
          result=num1/num2;
          printf("%5.2f/%5.2f=%5.2f",num1,num2,result);
      }
          else
          printf("In a division operation, the divisor can not be zero");
      break;

      default:
      printf("The operator is invalid");
    }

}

除法不可以除数为0的

#7

hbccc2020-04-07 19:40

scanf后面不是c，应该是%c