c语言中如何用代码设计一个简单计算器，实瑞两个浮点数的加减乘除，界面如图

# include<stdio.h>
void main()
{
double first_number,second_number,value;
char Operator;
printf("please enter the number:\n");
scanf("%lf%c%lf",&first_number,&Operator,&second_number);
switch(Operator)
{
case '+': printf("value=%lf",first_number+second_number );break;
case '-': printf("value=%lf",first_number-second_number );break;
case '*': printf("value=%lf",first_number*second_number );break;
case '/': {if(second_number==0) printf("wrong number\n");
else printf("value=%lf",first_number/second_number);}
}

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