Comm Engg LineCodingScemes

#include<iostream>
#include<cstring>
#include<cstdio>
using namespace std;

#define sf scanf
#define pf printf

char  figure[10][800];
int countPos=0;
int countNeg=0;

int polarNRZL(char signal[])
{
    int figTrack = 0;

    memset(figure,' ',sizeof(figure));

    int i, len = strlen(signal) , j;

    for(i=0; i<len; ++i)
    {
        figure[0][figTrack] = signal[i];

        if(signal[i] == '0')

        {
            countPos++;
            for(j=1; j<=4 ; ++j)
            {
                figure[1][figTrack] = figure[3][figTrack++] = '_';

              //  pf("%d", countPos);

            }
        }
        else if(signal[i] == '1')
        {
            countNeg++;
            for(j=1; j<=4; ++j)
            {
                figure[3][figTrack] = figure[6][figTrack++] = '_';

            }
        }

        if(i+1<len && signal[i]!=signal[i+1])
        {
            for(j=2; j<6; ++j)
            {
                figure[j][figTrack] = '|';
            }
            figTrack++;
        }
    }

    return figTrack;
}

int polarNRZI(char signal[])
{
    int figTrack = 0;
    memset(figure,' ',sizeof(figure));

    bool flag = 0;
    int i , len = strlen(signal) , j;

    for(i=0; i<len; ++i)
    {
        figure[0][figTrack] = signal[i];

        if(signal[i] == '1')
        {
            flag ^= true;
            for(j=2; j<6; ++j)
            {
                figure[j][figTrack] = '|';
            }
            figTrack++;
        }

        if(!flag)
        {
            countPos++;
            for(j=1; j<=4 ; ++j)
            {
                figure[1][figTrack] = figure[3][figTrack++] = '_';
            }
        }
        else
        {
            countNeg++;
            for(j=1; j<=4; ++j)
            {
                figure[3][figTrack] = figure[6][figTrack++] = '_';
            }
        }
    }

    return figTrack;
}



void drawFigure(int length)
{
    for(int i=0; i<7; ++i)
    {
        for(int j=0; j<length; ++j)
            pf("%c",figure[i][j]);
        pf("\n");
    }
    pf("For Positive %d", countPos);
    pf("For Negative %d", countNeg);
    return ;
}

int main()
{
    int  select , length ;
    char signal[1000];
    do
    {
        pf("1 >> to get Polar NRZ-L\n");
        pf("2 >> to get Polar NRZ-I\n");
        pf("0 >> for EXIT\n");

        sf("%d",&select);

        if(select == 1)
        {
            pf("polarNRZL ----> ");
            sf(" %s",signal);
            pf("%s\n",signal);
            length = polarNRZL(signal);
        }
        else if(select == 2)
        {
            pf("polarNRZI ----> ");
            sf(" %s",signal);
            pf("%s\n",signal);
            length = polarNRZI(signal);
        }
        else
            break;
        drawFigure(length);
        pf("\n\n\n");
        countPos=0;
        countNeg=0;

    }
    while(true);

    return 0;
}

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