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  1. //Q77. Check if the elements on the diagonal of a matrix are distinct.
  2. #include <stdio.h>
  3.  
  4. int main() {
  5.     int n, i, j, flag = 1;
  6.     printf("Enter size of square matrix: ");
  7.     scanf("%d", &n);
  8.     int arr[n][n];
  9.  
  10.  
  11.     printf("Enter matrix elements:\n");
  12.     for(i = 0; i < n; i++) {
  13.         for(j = 0; j < n; j++) {
  14.             scanf("%d", &arr[i][j]);
  15.         }
  16.     }
  17.  
  18.  
  19.     for(i = 0; i < n; i++) {
  20.         for(j = i+1; j < n; j++) {
  21.             if(arr[i][i] == arr[j][j]) {
  22.                 flag = 0;
  23.                 break;
  24.             }
  25.         }
  26.         if(flag == 0)
  27.             break;
  28.     }
  29.  
  30.     if(flag)
  31.         printf("All diagonal elements are distinct.\n");
  32.     else
  33.         printf("Diagonal elements are NOT distinct.\n");
  34.  
  35.     return 0;
  36. }
  37.  
Success #stdin #stdout 0s 5324KB
comments (?)
stdin 
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1 2 3
4 5 6
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stdout 
Enter size of square matrix: Enter matrix elements:
All diagonal elements are distinct.
https://ideone.com/Lr5nP1
language:
C (gcc 8.3)
created:
22 hours ago
visibility:
public

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