致命错误C1010：意外的文件结束而寻找预编译头指令

Question

#include<iostream.h>
const float PI=3.1416;
void main()
{
int graphic Type;
float radius,a,b,perimeter;
cout<<"选择图形的类型（1-圆形 2-长方形 3-正方形）：";
cin>>graphic Type;
swich(graphic Type)
{
case 1:
cout<<"请输入圆的半径为:";
cin>>radius;
perimeter=PI*2radius;
cout<<"圆"<<radius<<"周长为:"<<perimeter<<endl;
break;
case 2:
cout<<"请输入矩形的长，宽(以空格分隔):";
cin>>a>>b;
perimeter=2*(a+b);
cout<<"矩形"<<a<<":"<<B<<"的周长为:"<<perimeter<<endl;
break;
case 3:
cout<<"请输入正方形的边长为:";
cin>>a;
perimeter=a*4;
cout<<"正方形"<<a<<"的周长为:"<<perimeter<<endl;
break;
default:
cout<<"输入错误!"<<endl;
}
}

Answer 1

//在用int定义变量的时候，你那个是不合法的自定义标志符，空格是不合//法////的，应用字母、数字、下划线、中的一种或几种来组成，且字母不能是第//一个，
#include<iostream.h>
const float PI=3.1416;
void main()
{
int graphicType;
float radius,a,b,perimeter;
cout<<"选择图形的类型（1-圆形 2-长方形 3-正方形）：";
cin>>graphicType;
switch(graphicType)
{
case 1:
cout<<"请输入圆的半径为:";
cin>>radius;
perimeter=PI*2*radius;//这有个*不能省，
cout<<"圆"<<radius<<"周长为:"<<perimeter<<endl;
break;
case 2:
cout<<"请输入矩形的长，宽(以空格分隔):";
cin>>a>>b;
perimeter=2*(a+b);
cout<<"矩形"<<a<<":"<<b<<"的周长为:"<<perimeter<<endl;//是b,不是B
break;
case 3:
cout<<"请输入正方形的边长为:";
cin>>a;
perimeter=a*4;
cout<<"正方形"<<a<<"的周长为:"<<perimeter<<endl;
break;
default:
cout<<"输入错误!"<<endl;
}
}