c语言编写一个简单的计算器（有需要直接复制粘贴使用）

#include <stdio.h>

int main() {
   char operator;
   double num1, num2, result;

   printf("请输入运算符（+、-、*、/）：");
   scanf("%c", &operator);

   printf("请输入两个操作数：");
   scanf("%lf %lf", &num1, &num2);

   switch (operator) {
      case '+':
         result = num1 + num2;
         printf("结果：%.2lf\n", result);
         break;
      case '-':
         result = num1 - num2;
         printf("结果：%.2lf\n", result);
         break;
      case '*':
         result = num1 * num2;
         printf("结果：%.2lf\n", result);
         break;
      case '/':
         if (num2 != 0) {
            result = num1 / num2;
            printf("结果：%.2lf\n", result);
         } else {
            printf("错误：除数不能为0\n");
         }
         break;
      default:
         printf("错误：无效的运算符\n");
   }

   return 0;
}