Katy project

#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <string.h>

void initFiles( char inputFile[], char outputFile[] );
FILE* openFile( char fileName[], char action[] );
int closeFile( FILE* );

int main( int argc, char **argv )
{
    int i, j = 0;
    char inputFile[10], outputFile[10];     //failinimede defineerimine
    int digits[3];
    char letter[3] = {'A', 'B', 'H'};
    int A, B, H;
    double X, Y;

    FILE *fi, *fo;      //faili viidad (file input, file output)

    initFiles( inputFile, outputFile );

    printf( "Algandmete faili nimi on - %s\n", inputFile );
    printf( "Tulemuste faili nimi on - %s", outputFile );
    /*scanf( "%s", inputFile );

    printf( "Tulemuste faili nimi on " );
    scanf( "%s", outputFile );*/

    fi = openFile( inputFile, "r" );
    fo = openFile( outputFile, "w" );


    while ( EOF != fscanf( fi, "%d", &j ) )     //loeb failist lopuni
    {
        if ( 3 > i )
        {
            fprintf( fo, "%c = %d\n", letter[ i ], j );
            digits[ i ] = j;
        }
        i++;
        //printf( "%2d. arv on %d\n", i, x );
        //fprintf( fo, "%c = %d\n", c, x );
        //printf( "%d ", x );
    }

    i = 0;

    A = digits[0];
    B = digits[1];
    H = digits[2];

    printf( "Here is A = %d\n", A );
    fprintf( fo, "Here is A = %d\n", A );
    printf( "Here is B = %d\n", B );
    fprintf( fo, "Here is B = %d\n", B );
    printf( "Here is H = %d\n", H );
    fprintf( fo, "Here is H = %d\n", H );

    printf( "\n" );

    printf( "\tARGUMENT\t|\tFunktsioon\n" );
    printf( "\t________\t|\t__________\n" );

    do
    {
        if ( 0 == i )
        {
            X = A;
        }

        if ( X > B )
        {
            if ( 1 == i )
            {
                X = A + H;
            }

            if ( 1 < i )
            {
                X = A + i * H;
            }

            if ( X < B )
            {
                return 0;
            }
        }

        if ( X < B )
        {
            if ( 1 == i )
            {
                X = A + H;
            }

            if ( 1 < i )
            {
                X = A + i * H;
            }

            if ( X > B )
            {
                return 0;
            }
        }

        Y = log( sqrt( exp( (double)( X - 1 ) ) ) );

        if (  0 > exp( X - 1 ) )
        {
            printf( "Puudub\n" );
        }
        else
        {
            printf( "\t%10.4lf\t|%10.4lf\n", X, Y );
            fprintf( fo, "\t%10.4lf\t|%10.4lf\n", X, Y );
        }

        if ( X == B )
        {
            return 0;
        }

        i++;
    }
    while ( 1 );

    closeFile( fi );    //faili (file input) sulgemine
    closeFile( fo );    //faili (file output) sulgemine

    return 0;
}

void initFiles( char inputFile[], char outputFile[] )
{
    printf( "Algandmete faili nimi on: " );
    scanf( "%s", inputFile );

    printf( "Tulemuste faili nimi on: " );
    scanf( "%s", outputFile );
}

FILE* openFile( char fileName[], char action[] )
{
    FILE *file = fopen( fileName, action );
    char act[20];

    switch ( action[0] )
    {
        case 'w':
        {
            strcpy( act, "kirjutamiseks" );
        }
        break;

        case 'r':
        {
            strcpy( act, "lugemiseks" );
        }
        break;
    }

    if ( NULL == file )
    {
        printf( "\nFile \"%s\" polnud vyimalik avada %s.\n", fileName, act );
        return 1;
    }

    return file;
}

int closeFile( FILE *file )
{
    int closed = 1;

    if ( NULL == file )
    {
        fprintf( stderr, "Faili pole vyimalik sulgeda." );
        return 1;
    }

    do
    {
        if ( 0 == fclose( file ) )
        {
            closed = 0;
        }
    }
    while ( 0 != closed );

    return 0;
}