向各位请问一个简单的有关问题

向各位请教一个简单的问题？
#include<iostream>
using namespace std;
int main()
{
int t=0,t1=0,t2=0,hour1,hour2,minute1,minute2;
cout<<"Please input the first time:";
cin>>hour1>>":">>minute1;
{
if((hour1<0 && hour1>24)||(minute1<0 && minute1>60))
cout<<"Please input the hour from 0 to 24 and the minute from 0 to 60"<<endl;
cout<<"Please input the second time:";
}
cin>>hour2>>":">>minute2;
{
if((hour2<0 && hour2>24)||(minute2<0 && minute2>60))
cout<<"Please input the hour from 0 to 24 and the minute from 0 to 60"<<endl;
}
t1=60*60*hour1+60*minute1;
t2=60*60*hour2+60*minute2;
if(t1>t2)
t=t1-t2;
else
t=t2-t1;
cout<<"The different time is: "<<t<<"S"<<endl;
return 0;
}

该程序实现的功能是：向程序输入两个时间，然后求出两个时间差。

[解决办法]
cin >>hour1 >>":" >>minute1;
cin >>hour2 >>":" >>minute2;

把这两句改一下，改成下面这样就行了：
cin >>hour1 >>minute1;
cin >>hour2 >>minute2;
[解决办法]

C/C++ code

if((hour1 &lt;0 && hour1 &gt;24) &#166; &#166;(minute1 &lt;0 && minute1 &gt;60))cout &lt; &lt;"Please input the hour from 0 to 24 and the minute from 0 to 60" &lt; &lt;endl;cout &lt; &lt;"Please input the second time:"; exit(1);//加个这个函数让程序结束}
[解决办法]
把程序改了一下， 你运行看看，你的那个条件式
if((hour1 &lt;0 && hour1 &gt;24) &#166; &#166;(minute1 &lt;0 && minute1 &gt;60))
逻辑不对，应该是
if((hour2 &lt;0 || hour2 &gt; 23)||(minute2 &lt; 0 || minute2 &gt;59))

我运行了，好像没什么问题，你看看吧

C/C++ code#include &lt;iostream&gt;using namespace std;int main(){    int t=0,t1=0,t2=0,hour1,hour2,minute1,minute2;        do{        cout&lt;&lt;"Please input the first time:";        cin&gt;&gt;hour1&gt;&gt;minute1;        if((hour1 &lt; 0 || hour1 &gt; 23)||(minute1 &lt; 0 || minute1 &gt;59))        {            cout&lt;&lt;"Please input the hour from 0 to 24 and the minute from 0 to 60";            cout&lt;&lt;"\n"&lt;&lt;endl;        }    }    while((hour1 &lt;0 || hour1 &gt;24)||(minute1 &lt;0 || minute1 &gt;60));    do{        cout&lt;&lt;"Please input the second time:";        cin&gt;&gt;hour2&gt;&gt;minute2;        if((hour2 &lt;0 || hour2 &gt; 23)||(minute2 &lt; 0 || minute2 &gt;59))        {            cout&lt;&lt;"Please input the hour from 0 to 24 and the minute from 0 to 60";            cout&lt;&lt;"\n"&lt;&lt;endl;        }    }    while((hour2 &lt;0 || hour2 &gt; 23)||(minute2 &lt; 0 || minute2 &gt;59));    t1=60*60*hour1+60*minute1;    t2=60*60*hour2+60*minute2;    if(t1 &gt;= t2)        t=t1-t2;    else        t=t2-t1;    cout &lt;&lt;"The different time is:  " &lt;&lt;t &lt;&lt;"S" &lt;&lt;endl;    return 0;}

向各位请问一个简单的有关问题

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