Alternating something in a matrix

[lolapurple]

So basically I am supposed to present this 7x7 matrix and then off the the user to change part of the matrix. My problem is that when I enter start at [0,1] and end at [3,6] it ends at [2,5] instead. The rows and columns should each be from 0-6 in a 7x7 matrix. HELP!

  #include <iostream>
#include <iomanip>
#define myRow 7
#define myClmn 7
using namespace std;
int x,y,sClmn,sRow,lRow,lClmn;
int main()
{double number;
    cout<<"-----------------------------\nSolution for Assignment #7\n----------------------------\nSection #1: Display The Matrix\n";
    int mymatrix[myRow][myClmn]={{2,5,6,3,5,9,1},{3,0,8,5,6,1,2},{6,4,9,6,5,2,3},{1,-4,2,5,1,0,4},{4,9,6,2,2,7,5},{7,1,6,9,8,9,6},{-2,-3,-4,5,-6,-7,7}};
    
    for (int x=0; x<myRow; x++)
    {
        for(int y=0;y<myClmn;y++)
        { cout<<setw(14)<<mymatrix[x] [y]<<" ";
        
        }
        cout<<endl;
    }
    
    cout<<"\nSection #2: Get the input from the user\nEnter the number you would like to add: \n";
    cin>> number;
    cout<<"Define the section of a the matix to add the number";
    cout<<"Please enter the starting cell address\nRow= ";
    cin>>sRow;
    cout<<"\nColumn: ";
    cin>>sClmn;
    cout<<"Please enter the ending cell address\nRow= ";
    cin>>lRow;
    cout<<"\nColumn: ";
    cin>>lClmn;
    
    for (x=sRow;x<lRow; x++)
    {
        for(y=sClmn; y<lClmn; y++)
        {mymatrix [x][y]=mymatrix[x][y]+number;}
    }

    cout<<"Matrix after the process\n";
    for(x=0; x<myRow; x++)
    {
        for(y=0; y<myClmn;y++)
            cout<<setw(14)<<mymatrix [x][y];
    cout<<endl;
    }

cout <<"--------------------\nEnd of Assignment #7\n------------------------";

    //system("pause");
    return 0;
}

[fg109]

x<lRow y<lClmn

You give the end as (3, 6). That means lRow == 3 and lClmn == 6. What does the loop do when x == 3 and y == 6? Nothing! It exits the loop.

[anup30]

line 33, x<=lRow;
line 35, y<=lClmn;