C program to print diagonal elements of a matrix?

   #include<stdio.h>
 
int main()
{
    int array1[10][10],i,j,m,n,sum = 0;
    printf("Enter no. of rows :: ");
        scanf("%d", &m);
        printf("nEnter no. of cols :: ");
        scanf("%d",&n);
        printf("nEnter values to the matrix :: n");
        for (i = 0; i < m; i++)
        {
            for (j = 0; j < n; j++)
            {
                 printf("nEnter a[%d][%d] value :: ",i,j);
                 scanf("%d", &array1[i][j]);
        }
    }
 
    printf("nThe Diagonals elements of a matrix are :: nn");
 
    /*check condition to print diagonals, matrix must be square matrix*/
    if(m==n)
    {
            /*print diagonals*/
            for(i=0;i<m;i++)
            {
                for(j=0;j<n;j++)
                {
 
                    if(i==j)
                        printf("t%d", array1[i][j]);    /*print elements*/
                    else
                        printf("t");   /*print space*/
                }
                printf("nn");   /*after each row print new line*/
            }
    }
    else
    {
        printf("nMatrix is not a Square Matrix.");
    }
    return 0;   
}