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