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你自己想想while的判断顺序就明白了In Reply To:过了,但是不知道为什么。为什么把cin>>a>>b;拿到外面来下面再写一次就行?如下 Posted by:faononl at 2004-03-02 22:24:39 > #include <iostream.h> > void main() > { > int a, b ,i ,num , max ,temp ; > cin >> a >> b ; > while(cin) > { > > > max = 0 ; > cout << a << ' ' << b ; > if ( a >b ) {temp = a ;a = b ;b = temp ;} > for( i = a ; i<=b ; i++ ) > { > temp = i ; > num = 1 ; > while(temp != 1 ) > { > if ( temp % 2 == 0 ) temp/=2 ; > else temp=temp*3+1 ; > num++ ; > } > if ( num > max ) max = num ; > } > cout << ' ' << max << endl; > cin >> a >> b ; > } > } Followed by:
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