C++的异常捕捉

[newman0708]

int act;
while(act!=9){
cout<<"\nEnter your action:";
cin>>act;
try{

//在这里不知道怎么去捕捉异常
//当输入为字符或者是汉字时，就不正常了，
//为了防止这种现象的出现，我想做一个异常捕捉。

//throw "Wrong Input!";
}
catch(string msg){
cout<<"Error: "<<msg<<endl;
continue;
}

...
｝

希望各位能帮忙，谢谢！

[富莱工作室]

#include <iostream>
#include <string>
using namespace std;

int main()
{
char act;
while(act!='9')
{
cout<<"\nEnter your action:";

try
{
cin>>act;
if(act < 0x30 || act > 0x39)
{
string msg("Wrong Input");
throw(msg);
}
}

catch(string msg)
{
cout<<"Error: "<<msg<<endl;
}
}


return 0;

}

[Salam2001]

int act;

do{
cout << "\nEnter your action:";
try
{
cin >> act;
if( !cin ) // cin 本身有类型检查功能,类型不匹配时会设置 cin 的 failbit
throw string( "Wrong Input!" );
}
catch( string msg )
{
cout << "Error: " << msg << endl;
cin.clear();
while( cin.get() != '\n' ); // get rid of extra characters
continue;
}
}while( act != 9 );