Форум программистов [Powered by Invision Power Board]

Код

#include <iostream>
using std::cout;
using std::cin;

int find( char string[], char required[], int numberOfCharactersPerLine, int numberOfCharactersInTheDesired );

int firstStageOfTheAnalysisLine( char string[], char required[], int stringLength, int requiredLength );

int secondStageOfTheAnalysisLine( char string[], char required[], int stringLength, int requiredLength,
                 int positionOfFirstCharacter, int positionOfLastCharacter );

void getCharacterPosition( char string[], char required[], int stringLength, int requiredLength,
                          int &positionOfFirstCharacter, int &positionOfLastCharacter );

int compareTheOccurrence( char string[], char required[], int requiredLength, 
                         int positionOfFirstCharacter, int positionOfLastCharacter );
int main( int argc, char *argv[] ) {
    char string[ 128 ];
    char required[ 128 ];
    cin.getline( string, 227 );
    cin.getline( required, 127 );
    int pos = find( string, required, 7, 2);

    cout << pos;

    return 0;
}

int find( char string[], char required[], int numberOfCharactersPerLine, int numberOfCharactersInTheDesired  ) {
    int stringLength = numberOfCharactersPerLine;
    int requiredLength = numberOfCharactersInTheDesired;

    int positionOfFirstCharacter = 0;
    int positionOfLastCharacter = 0;


    if( firstStageOfTheAnalysisLine( string, required, stringLength, requiredLength ) == 0 ) {
        getCharacterPosition( 
            string,
            required, 
            stringLength, 
            requiredLength,
            positionOfFirstCharacter, 
            positionOfLastCharacter 
            );
    }

    if( secondStageOfTheAnalysisLine( string, required, stringLength, requiredLength,
        positionOfFirstCharacter, positionOfLastCharacter ) != 0 )
            return ( - 1 );

    return positionOfFirstCharacter;
}

void getCharacterPosition( char string[], char required[], int stringLength, int requiredLength,
                          int &positionOfFirstCharacter, int &positionOfLastCharacter ) {
        const int firstCharacter = 0;
        const int lastCharacter = requiredLength - 1;

        for( int i = 0; i < stringLength; i++ ) {
            if( string[ i ] == required[ firstCharacter ] )
                positionOfFirstCharacter = i;
            else if( string[ i ] == required[ lastCharacter ] )
                positionOfLastCharacter = i;
        }
    return;
}
int secondStageOfTheAnalysisLine( char string[], char required[], int stringLength, int requiredLength,
                 int positionOfFirstCharacter, int positionOfLastCharacter ) {
    if( requiredLength != ( ( positionOfLastCharacter - positionOfFirstCharacter ) + 1 ) )
        return ( -1 );
    else {
        if( compareTheOccurrence( string, required, requiredLength,
            positionOfFirstCharacter, positionOfLastCharacter ) != 0 )
                return ( -1 );
    }
    return 0;
}

int firstStageOfTheAnalysisLine( char string[], char required[], int stringLength, int requiredLength ) {
    if( stringLength < requiredLength )
        return ( -1 );
    else if( stringLength == requiredLength )
            for( int i = 0; i < stringLength; i++ )
                if( string[ i ] != required[ i ] )
                    return ( -1 );
    return 0;
}

int compareTheOccurrence( char string[], char required[], int requiredLength, 
                         int positionOfFirstCharacter, int positionOfLastCharacter ) {
    for( int i = 0, k = positionOfFirstCharacter; i < requiredLength, k <= positionOfLastCharacter; k++, i++ ) {
        if( string[ k ] != required[ i ] )
            return ( -1 );
        }
    return 0;
}