Show how bitmapped graphics may be used

#include <stdio.h>

#define X_SIZE 40
#define Y_SIZE 60

char graphics[X_SIZE / 8][Y_SIZE];   /* the graphics data */
void print_graphics(void);
#define SET_BIT(x,y) graphics[(x)/8][y] |= (0x80 >>((x)%8))

int main()
{
    int loc;
    int x;
    int y;

    for (y = 0; y < Y_SIZE; ++y) {
        for (x = 0; x < X_SIZE / 8; ++x) {
            graphics[x][y] = '.';
        }
    }


    for (loc = 0; loc < X_SIZE; ++loc)
        SET_BIT(loc, loc);

    print_graphics();
    return (0);
}
void print_graphics(void)
{
    int x;
    int y;
    int bit;

    for (y = 0; y < Y_SIZE; ++y) {
        for (x = 0; x < X_SIZE / 8; ++x) {
            for (bit = 0x80; bit > 0; bit = (bit >> 1)) {
                if ((graphics[x][y] & bit) != 0){
                    printf("*");
                }else{
                    printf("%c",graphics[x][y]);
                }
            }
        }
        printf("\n");
    }
}

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Show how bitmapped graphics may be used : Array Char « Data Type « C / ANSI-C

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