C语言计算试题程序

#include
int main()
{
 //定义两个变量
 float factor_1, factor_2;
 //结果
 double result;
 //运算符
 char operation;
 //输入 number1  符号  number2
 scanf("%f%c%f",&factor_1, &operation, &factor_2);
 if(operation == '+')
 {
  result = factor_1 + factor_2;
  printf("和是 %f\n",result);
 }
 else if(operation =='-')
 {
  result = factor_1 - factor_2;
  printf("差是 %f\n",result);
 }
 else if(operation =='*')
 {
  result = factor_1 * factor_2;
  printf("积是 %f\n",result);
 }
 else if(operation =='/')
 {
  if (factor_2 == 0)
  {
   printf("除数不能为0\n");
   return 0;
  }
  result = factor_1/factor_2;
  printf("商是 %f\n",result);
 }
 else
 {
  printf("呃......不会了\n");
  return 0;
 }
 return 0;
}