fig04_69.cpp

经典书籍源代码啊。。。第三版。。。数据结构与算法分析——C++描述(第3版).

// Returns true if word1 and word2 are the same length
// and differ in only one character.
bool oneCharOff( const string & word1, const string & word2 )
{
    if( word1.length( ) != word2.length( ) )
        return false;

    int diffs = 0;

    for( int i = 0; i < word1.length( ); i++ )
        if( word1[ i ] != word2[ i ] )
            if( ++diffs > 1 )
                return false;

    return diffs == 1;
}