code. compile. run. debug. share.
#include <iostream>
using namespace std;
int main()
{
int row,column,a[50][50];
cout<<"Enter the row"<<endl;
cin>>row;
cout<<"Enter the column"<<endl;
cin>>column;
cout<<"ENter the matrix"<<endl;
for(int i=0;i<row;i++)
{
for(int j=0;j<column;j++)
{
cin>>a[i][j];
}
}
int cum_sum[50][50];
cum_sum[0][0]=a[0][0];
int j=1;
int sum=a[0][0];
sum=0;
for(int li=0;li<row;li++)
{
for(int lj=0;lj<column;lj++)
{
sum=0;
for(int i=0;i<=li;i++)
{
for(int j=0;j<=lj;j++)
{
sum=sum+a[i][j];
}
}
cum_sum[li][lj]=sum;
}
}
cout<<"Cumlative sum"<<endl;
for(int i=0;i<row;i++)
{
for(j=0;j<column;j++)
{
cout<<cum_sum[i][j]<<" ";
}
cout<<endl;
}
sum=0;
for(int li=0;li<row;li++)
{
for(int lj=0;lj<column;lj++)
{
for(int i=li;i<row;i++)
{
for(int j=lj;j<column;j++)
{
if(li!=0 and lj!=0)
{
sum=sum+cum_sum[i][j]-cum_sum[i][lj-1]-cum_sum[li-1][j]+cum_sum[li-1][lj-1];
}
else if(li==i and lj==j)
{
sum=sum+a[i][j];
}
else if(li==0)
{
sum=sum+cum_sum[i][j]-cum_sum[i][lj-1];
}
else
{
sum=sum+cum_sum[i][j]-cum_sum[li-1][j];
}
// cout<<"start="<<li<<","<<lj<<" end="<<i<<","<<j<<" Sum="<<sum<<endl;
}
}
}
}
cout<<sum<<endl;
}
Compiling Program...
Standard Input:
Interactive Console
Text
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