Column Sum Of A Matrix

Column sum is a matrix operation in which the elements of each column are added and stored 
in a different array.......

Program:





#include<iostream>
#include<iomanip>
#include<windows.h>


using namespace std;

/*
          This is a function to compute
           the column sum....
*/

void colsum(int a[][30],int b[],int m,int n)
{
    int i,j;
    b[n];
    for(j=0;j<n;++j)
    {
        b[j]=0;                    // Initializes sum to zero at begining of each column
        for(i=0;i<m;++i)
        {
            b[j]+=a[i][j];
        }
    }
}

int main()
{
system("cls");
        cout<<setw(54)<<"*****----------------------*****\n";
        cout<<setw(54)<<"*****COLUMN SUM OF A MATRIX*****\n";
        cout<<setw(54)<<"*****----------------------*****\n";
        cout<<"\n\n";
        int a[30][30],b[30],m,n,i,j;
        cout<<"\tEnter row size: ";
        cin>>m;
        cout<<"\tEnter column size: ";
        cin>>n;
        cout<<"\n\n\tEnter the matrix: \n\n";
        for(i=0;i<m;++i)
        {
        for(j=0;j<n;++j)
                {
                  cout<<"\tEnter ["<<i<<"]["<<j<<"] : ";
                        cin>>a[i][j];
                }
        }
        Sleep(1000);
        system("cls");
        cout<<"\n\n\n\t\t\tThe matrix is: \n\n";
        for(i=0;i<m;++i)
        {
        for(j=0;j<n;++j)
                {
                  cout<<a[i][j]<<" ";
                }
                cout<<endl;
        }
        cout<<"\n\n\t\t\tProcessing.......";
        Sleep(2200);
        cout<<"\n\n\n\t\tThe column sum of the matrix is: \n\n";
        colsum(a,b,m,n);
        for(i=0;i<n;++i)
        cout<<"Column "<<i+1<<" : "<<b[i]<<"\n";
        return 0;
}


Output: