Question

Assume an MxN array has been filled, write a function to calculate the sum of each column which should be stored into a third 1D array of size N. code in C++

Answer 1

#include <iostream> 
using namespace std;
#define m 4
#define n 4
// give any value to m and n
void column_sum(int arr[m][n],int arr2[n]) 
{ 
  
    int i,j,sum = 0; 
    int k=0;
  
    cout << "\nFinding Sum of each column:\n\n"; 
  
     
    for (i = 0; i < m; ++i) { 
        for (j = 0; j < n; ++j) { 
  
           
            sum = sum + arr[j][i]; 
            
        } 
        arr2[k]=sum;
        k++;
        cout 
            << "Sum of the column "
            << i << " = " << sum 
            << endl; 
        
       
        sum = 0; 
    } 
    cout<<"The content of 1d array is:\n";
    for(i=0;i<n;i++){
        cout<< arr2[i] ;
    }
}
int main() 
{ 
    int i,j; 
    int arr[m][n]; 
    int arr2[n];
    int x = 1; 
    for (i = 0; i < m; i++) 
        for (j = 0; j < n; j++) 
            arr[i][j] = x++; 
  
    column_sum(arr,arr2); 
  
    return 0; 
}