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  1.  #include <stdio.h>
  2.  
  3.  int main()
  4.  {
  5.      int array[100], i, num,diff, resDiff, startIndx, resStartIndx, countCur, countPre;
  6.      printf("Enter the size of an array \n");
  7.      scanf("%d", &num);
  8.  
  9.      printf("Enter the elements of the array \n");
  10.      for (i = 0; i < num; i++) {
  11.          scanf("%d", &array[i]);
  12.      }
  13.  
  14.      //Now code changes
  15.      startIndx =0, resStartIndx=0, countPre=0, resDiff=0;
  16.      for (i = 0; i < num; /*No increment required here*/) {
  17.          countCur =0;
  18.          startIndx=i;
  19.          countCur++;
  20.  
  21.          if(++i < num)
  22.          {
  23.              diff = array[i] - array[startIndx];
  24.              countCur++;
  25.              i++;
  26.              while((i < num) && (diff == (array[i] - array[i-1])))
  27.              {
  28.                  countCur++;
  29.                  i++;
  30.              }
  31.  
  32.              if(countCur > countPre)
  33.              {
  34.                  resStartIndx = startIndx;
  35.                  printf("%d | %d | %d | %d\n",array[resStartIndx], resStartIndx, startIndx, countCur);
  36.                  countPre = countCur;
  37.                  resDiff = diff;
  38.              }
  39.          }
  40.      }
  41.  
  42.      countPre += resStartIndx;
  43.      printf("\n Numbers in a.p: ");
  44.      for (i = resStartIndx; i < countPre; i++) {
  45.          printf("%d, ", array[i]);
  46.      }
  47.      printf("\n Common difference:%d", resDiff);
  48.      return 0;
  49.  }
Success #stdin #stdout 0s 10320KB
comments (?)
stdin 
7 5 1 2 4 6 8 12
stdout 
Enter the size of an array 
Enter the elements of the array 
5 | 0 | 0 | 2
2 | 2 | 2 | 4

 Numbers in a.p: 2, 4, 6, 8, 
 Common difference:2
https://ideone.com/EfLiT9
language:
C (gcc 8.3)
created:
8 years ago
visibility:
secret

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