嗨~我交了兩份看起來差不多的code上去

可是一個WA一個AC

來請問大家這兩支code的差別在哪@@

WA版:

#include<cstdio>
#include<cstdlib>
#include<cstring>
int judge( char* a, char* b )
{
    if( strcmp( a, b ) == 0 )
        return 0;
    char tmp[ 21 ] = { 0 };
    for( int i = 0; a[ i ]; ++a )
        if( a[ i ] != ' ' )
            tmp[ strlen( tmp ) ] = a[ i ];
    return strcmp( tmp, b )? 1 : 2;
}

int main()
{
    int t;
    char a[ 21 ], b[ 21 ], result[][ 20 ] = { "Yes", "Wrong Answer", "Output Format Error" };
    scanf( "%d\n", &t );   // scanf( "%d%*c", &t ) 也會錯

    for( int n = 1; n <= t; ++n )
    {
        gets( a );
        gets( b );
        printf( "Case %d: %s\n", n, result[ judge( a, b ) ] );
    }
}

AC版:

#include<cstdio>
#include<cstdlib>
#include<cstring>
int judge( char* a, char* b )
{
    if( strcmp( a, b ) == 0 )
        return 0;
    char tmp[ 21 ] = { 0 };
    for( int i = 0; a[ i ]; ++a )
        if( a[ i ] != ' ' )
            tmp[ strlen( tmp ) ] = a[ i ];
    return strcmp( tmp, b )? 1 : 2;
}

int main()
{
    int t;
    char a[ 21 ], b[ 21 ], result[][ 20 ] = { "Yes", "Wrong Answer", "Output Format Error" };
    gets( a ); t = atoi( a );  //就只差在這行而已

    for( int n = 1; n <= t; ++n )
    {
        gets( a );
        gets( b );
        printf( "Case %d: %s\n", n, result[ judge( a, b ) ] );
    }
}