Doubt in Sample Ques 7

[Rohan Saluja]

Can anyone please explain what is going on in this function?

Why Blank 4 is 1?

[rs rk]

Yes, the code seems to be incorrect.

#include <stdio.h>

int is_contiguous ( int a[], int size )

{

  int i;

  for(i=0;i<size-1;i++){

    if(a[i+1]-a[i]!=1){ /* not strictly increasing */

    break;

    }

  }

  if ( i == size ){ /* strictly increasing */ //should be size-1

  return 0;//should be return 1;

  }

  if ( i == 0){

    for(i=0;i<size-1;i++){

      if(a[i]-a[i+1]!=1){ /* not strictly decreasing */

        return 0;

      }

  }

  return 1;//should be return 0;

  } else{

      return 0;

    }

}

int main() {

  int a[5];

  int size = 5;

  a[0] = 1;

  a[1] = 2;

  a[2] = 3;

  a[3] = 4;

  a[4] = 5;

  int ans;

  ans = is_contiguous(a, size);

  printf("%i\n", ans);// 0 is printed but as per the question 1 should be printed

  return 0;

}