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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <time.h>
  4. #include <math.h>
  5.  
  6. struct point
  7. {
  8.     double x;
  9.     double y;
  10. } *points;
  11.  
  12. int main (int argc, char *argv[])
  13. {
  14.     int n = atoi(argv[1]);    
  15.     points = calloc(n, sizeof(struct point));    
  16.     srand((unsigned) time(NULL));
  17.  
  18.     for (int i=0; i<n; ++i){        
  19.         points[i].x = rand() / (double) RAND_MAX;
  20.         points[i].y = rand() / (double) RAND_MAX;        
  21.     }
  22.  
  23.     double maxlen = INFINITY;
  24.     int p1,p2;
  25.  
  26.     for (int i=0; i<n-1; ++i){
  27.         for (int j=i+1; j<n; ++j){            
  28.             double dx = points[j].x - points[i].x;
  29.             double dy = points[j].y - points[i].y;            
  30.             double len = sqrt(dx*dx + dy*dy);
  31.             if (len < maxlen){
  32.                 maxlen = len;
  33.                 p1 = i;
  34.                 p2 = j;
  35.             }
  36.         }
  37.     }
  38.  
  39.     for (int i=0; i<n; ++i){        
  40.         printf("%d (%f, %f) %c \n", i, points[i].x, points[i].y, ((i==p1) || (i==p2)) ? '*' : ' ');
  41.     }    
  42.  
  43.     free(points);    
  44.     return 0;
  45. }
Runtime error #stdin #stdout 0s 2156KB
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Standard input is empty
stdout
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Standard output is empty
https://ideone.com/7xxrTY
language:
C (gcc 8.3)
created:
9 years ago
visibility:
secret

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