题解 | #简单计算器#
简单计算器
https://www.nowcoder.com/practice/b8f770674ba7468bb0a0efcc2aa3a239
#include <stdio.h>
int main()
{
char flag;
double a, b;
scanf("%lf %c %lf", &a, &flag, &b);
if (flag != '+' && flag != '-' && flag != '*' && flag != '/')
printf("Invalid operation!\n");
else
{
switch (flag)
{
case '+':printf("%.4f+%.4f=%.4f\n", a, b, a + b);
break;
case '-':printf("%.4f-%.4f=%.4f\n", a, b, a - b);
break;
case '*':printf("%.4f*%.4f=%.4f\n", a, b, a * b);
break;
case '/':
{
if (b == 0)
printf("Wrong!Division by zero!\n");
else
printf("%.4f/%.4f=%.4f\n", a, b, a / b);
break;
}
}
}
return 0;
}
