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#2
luozhiweim2009-07-30 13:58
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程序代码：#include <iostream>
using namespace std;
while (true)
{
int num;
cin >> num;
if (num >=1 && num <= 20)
break;
else
cout << "please input again: " << endl;
}
using namespace std;
while (true)
{
int num;
cin >> num;
if (num >=1 && num <= 20)
break;
else
cout << "please input again: " << endl;
}
[[it] 本帖最后由 明次 于 2009-7-30 13:54 编辑 [/it]]
