[CODE]#include<iostream>
using namespace std;

int main()
{
int a;
cin>>a;
while(cin.fail())
{
cout<<"input a value,please : ";
cin.clear();
cin.sync();
cin>>a;
}
cout<<a<<endl;
system("pause");
return 0;
}[/CODE]
运行结果：
assdq
input a value,please : asd
input a value,please : assad
input a value,please : asasa
input a value,please : sasasas
input a value,please : asasas
input a value,please : 123.354
123
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