Q. Sum of first,second,third rows,all elements and diagonal in matrix ?

THE OUTPUT WOULD BE

 
#include<stdio.h>
#include<conio.h>
  void main( )
  {    clrscr( );
        int a[3][3],j,i,s1=0,s2=0,s3=0,s=0,S=0;
        for(i=0;i<3;i++)
        { for(j=0;j<3;j++)
           { printf("Enter an element:");
              scanf("%d",&a[i][j]);
           }
        }
        printf("\nArray elements are:\n");
        for(i=0;i<3;i++)
        { for(j=0;j<3;j++)
           { printf("\t%d",a[i][j]);
           }
           printf("\n");
        }
        for(j=0;j<3;j++)
        {   s1=s1+a[0][j];
             s2=s2+a[1][j];
             s3=s3+a[2][j];
        }
        for(i=0;i<3;i++)
        { for(j=0;j<3;j++)
           { S=S+a[i][j];
           }
        }
        for(i=0;i<3;i++)
        { for(j=0;j<3;j++)
           { i=j;
              s=s+a[i][j];
           }
        }
        printf("\nSum of first row=%d",s1);
        printf("\nSum of second row=%d",s2);
        printf("\nSum of third row=%d",s3);
        printf("\nSum of elements=%d",S);
        printf("\nSum of diagonal=%d",s);
        getch( );

}