C program to read a matrix and print it's diagonals

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mahmoud2506

2022-05-04

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#include <stdio.h>
 
#define MAXROW      10
#define MAXCOL      10
 
int main()
{
    int matrix[MAXROW][MAXCOL];
    int i,j,r,c;
     
    printf("Enter number of Rows :");
    scanf("%d",&r);
    printf("Enter number of Cols :");
    scanf("%d",&c);
 
    printf("\nEnter matrix elements :\n");
    for(i=0;i< r;i++)
    {
        for(j=0;j< c;j++)
        {
            printf("Enter element [%d,%d] : ",i+1,j+1);
            scanf("%d",&matrix[i][j]);
        }
    }
 
    /*check condition to print diagonals, matrix must be square matrix*/
    if(r==c)
    {
            /*print diagonals*/
            for(i=0;i< c;i++)
            {
                for(j=0;j< r;j++)
                {
 
                    if(i==j)
                        printf("%d\t",matrix[j][i]);    /*print elements*/
                    else
                        printf("\t");   /*print space*/
                }
                printf("\n");   /*after each row print new line*/      
            }
    }
    else
    {
        printf("\nMatrix is not a Square Matrix.");
    }
    return 0;   
}

Output

    First Run:
    Enter number of Rows :2 
    Enter number of Cols :3 

    Enter matrix elements : 
    Enter element [1,1] : 1 
    Enter element [1,2] : 2 
    Enter element [1,3] : 3 
    Enter element [2,1] : 4 
    Enter element [2,2] : 5 
    Enter element [2,3] : 6 

    Matrix is not a Square Matrix.

    Second Run:
    Enter number of Rows :4 
    Enter number of Cols :4 

    Enter matrix elements : 
    Enter element [1,1] : 1 
    Enter element [1,2] : 2 
    Enter element [1,3] : 3 
    Enter element [1,4] : 4 
    Enter element [2,1] : 5 
    Enter element [2,2] : 6 
    Enter element [2,3] : 7 
    Enter element [2,4] : 8 
    Enter element [3,1] : 9 
    Enter element [3,2] : 10 
    Enter element [3,3] : 11 
    Enter element [3,4] : 12 
    Enter element [4,1] : 13 
    Enter element [4,2] : 14 
    Enter element [4,3] : 15 
    Enter element [4,4] : 16 
    1				 
	    6			 
		    11		 
			    16

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C program to read a matrix and print it\'s diagonals

C program to read a matrix and print it's diagonals

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