Write a program that prints the letter X composed of asterisks?

Answer 1

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

void draw_x(int width, int height);

int main(int argc, char *argv[]){

int width, height;

if(argc != 3){

printf("Syntax: this_program width height\n");

exit(1);

}

width = atoi(argv[1]);

height = atoi(argv[2]);

// make sure they're both positive non-zeros

if(height > 0 && width > 0){

draw_x(width, height);

}else{

printf("numbers must be naturals\n");

exit(1);

}

return 0;

}

void draw_x(int width, int height){

int tally = 0;

int drawx, drawy;

char grid[height][width + 1];

memset(grid, ' ', height * (width + 1) * sizeof(char));

if(width > height){

drawy = 0;

for(drawx = 0; drawx < width; drawx++){

tally += height;

if(tally > width){

tally -= width;

drawy++;

}

grid[drawy][drawx] = '*';

grid[drawy][width - drawx - 1] = '*';

}

}else{

drawx = 0;

for(drawy = 0; drawy < height; drawy++){

tally += width;

if(tally > height){

tally -= height;

drawx++;

}

grid[drawy][drawx] = '*';

grid[drawy][width - drawx - 1] = '*';

}

}

for(drawy = 0; drawy < height; drawy++){

grid[drawy][width] = 0;

printf("%s\n", grid[drawy]);

}

}