我是名新手，下列程序哪里错误如何纠正，请大神赐教 - C语言论坛

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标题：我是名新手，下列程序哪里错误如何纠正，请大神赐教

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x1921171331

等　级：新手上路
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楼主

已结贴√ 问题点数：20 回复次数：6

我是名新手，下列程序哪里错误如何纠正，请大神赐教

#include <stdio.h>
void 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 (num!=o)
      {
          result=num1/num2;
          printf("%5.2f/%5.2f=%5.2f",numi,num2.result);
      }
      else
          printf("In a division operation, the divisor can not be zero);
      break;

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

}

2020-04-07 18:02

叶纤

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帖　子：658
专家分：848
注　册：2019-11-22

第 2 楼

得分:7

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]

把学习时间浪费在混坛上是傻瓜行为，更何况自己的水平连一两都没到。

2020-04-07 18:09

x1921171331

等　级：新手上路
帖　子：5
专家分：0
注　册：2020-4-7

第 3 楼

得分:0

回复 2楼叶纤

谢谢

2020-04-07 18:44

天下天下

等　级：论坛游民
帖　子：62
专家分：15
注　册：2013-10-14

第 4 楼

得分:7

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");
    }

}

2020-04-07 18:55

x1921171331

等　级：新手上路
帖　子：5
专家分：0
注　册：2020-4-7

第 5 楼

得分:0

回复 4楼天下天下

谢谢

2020-04-07 19:23

叶纤

等　级：禁止访问
威　望：1
帖　子：658
专家分：848
注　册：2019-11-22

第 6 楼

得分:0

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

把学习时间浪费在混坛上是傻瓜行为，更何况自己的水平连一两都没到。

2020-04-07 19:31