/* 9. W.A.P. to read a matrix A(M x N) and find the following using functions :
(a) Sum of elements of each M rows
(b) Sum of elements of each N columns
(c) Sum of all the elements in a matrix */
#include<stdio.h>
int sumrow( int , int , int );/* Prototype */ int sumcol( int , int , int ); /* Prototype */
void main()
{
int sumrow(int irow, int ncol, int a[10][10]); /* Function Prototypes */
int sumcol(int jcol, int mrow, int a[10][10]);
int i,j,m,n,tot=0,a[10][10]; /* Variable Declarations */
clrscr();
printf("Enter how many rows & columns you need for the matrix (M x N) : ");
scanf("%d %d",&m,&n);
if ((m!=0) && (n!=0))
{
printf("\n\nEnter (M x N) elements of Matrix below :\n");
for (i=0; i<m; i++)
for (j=0; j<n; j++)
scanf("%d",&a[i][j]);
printf("\n\nSum of the elements are as follows :\n");
/* Calling function 'sumrow' to add all elements of rows */
for (i=0; i<m; i++)
{
printf("\nSum of elements of Row Number %d is %d",i+1,sumrow(i,n,a));
}
printf("\n");
/* Calling function 'sumcol' to add all elements of the columns */
for (j=0; j<n; j++)
{
printf("\nSum of elements of Column Number %d is %d",j+1,sumcol(j,m,a));
}
/* Calling function 'sumrow' to add all elements of the given matrix(M x N) */
for (i=0; i<m; i++)
tot+=sumrow(i,n,a);
printf("\n\nSum of all the elements of the given matrix is %d",tot);
}
else printf("!!! Invalid Input Entry. Please Try Again !!!");
getch();
}
int sumrow(int irow, int ncol, int a[10][10]) /* Function 'sumrow' */
{
int k,tot=0;
for (k=0; k<ncol; k++)
tot+=a[irow][k];
return(tot);
}
int sumcol(int jcol, int mrow, int a[10][10]) /* Function 'sumcol' */
{
int k,tot=0;
for (k=0; k<mrow; k++)
tot+=a[k][jcol];
return(tot);
}