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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. int main() {
  5.     int x1, y1, x2, y2;
  6.     int dx, dy, p, x, y;
  7.  
  8.     printf("Enter x1 y1: ");
  9.     scanf("%d %d", &x1, &y1);
  10.  
  11.     printf("Enter x2 y2: ");
  12.     scanf("%d %d", &x2, &y2);
  13.  
  14.     dx = abs(x2 - x1);
  15.     dy = abs(y2 - y1);
  16.  
  17.     x = x1;
  18.     y = y1;
  19.  
  20.     // Assume slope < 1 (simple version)
  21.     p = 2 * dy - dx;
  22.  
  23.     printf("\nPoints on the line:\n");
  24.  
  25.     while (x <= x2) {
  26.         printf("(%d, %d)\n", x, y);
  27.  
  28.         x++;
  29.  
  30.         if (p < 0) {
  31.             p = p + 2 * dy;
  32.         } else {
  33.             y++;
  34.             p = p + 2 * (dy - dx);
  35.         }
  36.     }
  37.  
  38.     return 0;
  39. }
Success #stdin #stdout 0s 5304KB
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stdin
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Standard input is empty
stdout
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Enter x1 y1: Enter x2 y2: 
Points on the line:
https://ideone.com/rQSkvr
language:
C99 (gcc 8.3)
created:
14 hours ago
visibility:
public

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