Tạo chuỗi

#include "graphics.h"

#define X 640
#define Y 320

#define ScreenW 160

int main( )
{
    system("MODE 160, 300");
    initwindow(X, Y, "First Sample");
    readimagefile("world-map.bmp", 0, 0, X - 1, Y - 1);

    float x, y;
    x = X / ScreenW;
    y = x / 0.75f;

    char str[1024] = "";
    int h = 0;      //bien chay
    int temp1 = 0;  //bien dem so '!' lien tiep
    int temp2 = 0;  //bien dem so ' ' lien tiep

    for (int i = 1; i < Y; i += y)
    {
        for (int j = 1; j < X; j += x)
        {
            if (getpixel(j, i) != WHITE)
            {
                if (temp2 != 0)
                {
                    str[h++] = 64 + temp2;
                    temp2 = 0;
                }
                temp1++;
                putchar('!');
            }
            else
            {
                if (temp1 != 0)
                {
                    str[h++] = 64 + temp1;
                    temp1 = 0;
                }
                temp2++;
                putchar(' ');
            }
        }
        if (temp1 != 0)
            str[h++] = '1';
        if (temp2 != 0)
            str[h++] = '0';
        temp1 = temp2 = 0;
        putchar('\n');
    }
    getch();
    str[h] = 0;
    puts(str);
}