Sir can u pls explain the error in the code

#1

#include
using namespace std;
int main(){
int n,i,j,arr[10][10];
cin>>n;

//reading array elements
for(i=0;i<n;i++){
	for(j=0;j<n;j++){
		cin>>arr[i][j];
	}
}

//displaying array elements
for(i=0;i<n;i++){
	for(j=0;j<n;j++){
		cout<<arr[i][j]<<" ";
	}
	cout<<endl;
}	

//cummulative adding across row 
for(i=0;i<n;i++){
	for(j=1;j<n;j++){
		arr[i][j]=arr[i][j-1]+arr[i][j];
	}
}


//cummulative adding across column after cummulative addition across rows
for(i=1;i<n;i++){
	for(j=0;j<n;j++){
		arr[i][j]=arr[i-1][j]+arr[i][j];
	}
}

//displaying final array
for(i=0;i<n;i++){
	for(j=0;j<n;j++){
		cout<<arr[i][j]<<" ";
	}
	cout<<endl;
}	

int li,lj,bi,bj;
for(li=0;li<n;li++){
	for(lj=0;lj<n;lj++){
		for(bi=li;bi<n;bi++){
			for(bj=lj;bj<n;bj++){
					int sum=0;
					sum+=arr[bi][bj]-arr[li-1][bj]-arr[bi][lj-1]+arr[li-1][lj-1];
					cout<<sum<<endl;
			}
		}
	}
}

}

#2

@Vaibhav277
please save the code at http://ide.codingblocks.com/ and then share link here.

#3
#4

sir i have saved it…

#5
#6

sir actually i want to print the sum of each submatrix and the sum of all the submatrices

#7

@Vaibhav277
your cummulative sum array construction is correct. But there is small mistake, what if li=0 and lj=0. arr[bi][lj-1], arr[li-1][bj] and arr[li-1][lj-1] doesn’t exist. Add these condition, your code will work.

#8

@Vaibhav277
After line 50, just add 3 condition i.e if((li-1) == 0 && (lj-1)==0)), if((li-1) == 0) and if((lj-1)==0))

#9

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