I have problem using loop

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C#

Write a program that prompts an  integer, and write multiplication table from 1 to that number. For example if the integer is 3 the output should be
1 2 3 4 5 6 7 8 9 10
2 4 6 8 10 12 16 18 20
3 6 9 12 15 18 21 24 27 30

Use nested for loops (two for loops one outer loop, one inner loop).

What I have tried:

C++

#include <iostream>

using namespace std;

int main()
{
    int num ,b,c,d;

  cout <<"Enter an  number to get the  multiplication table from 1 to that number"<<endl;
cin>>num;
for (b=1;b<=num;b++)
{ for(c=1;c<=num;c++)
{ d=b*c;
cout<<d;}
cout<<endl;}

  return 0;
}

Posted 4-Dec-16 8:50am

Member 12886219

Updated 4-Dec-16 9:25am

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CHill60 4-Dec-16 14:57pm

What is the problem?

2 solutions

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Patrice T · Accepted Answer · 2016-12-04T09:25:00

Use the debugger, by allowing you to see your code executing, it will help you to understand what is wrong.
In the example, each line stops at 10, 1 of your loops must stops at 10 too.

You should learn to use the debugger as soon as possible. Rather than guessing what your code is doing, It is time to see your code executing and ensuring that it does what you expect.

The debugger allow you to follow the execution line by line, inspect variables and you will see that there is a point where it stop doing what you expect.
Debugger - Wikipedia, the free encyclopedia[^]
Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]

The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't find bugs, it just help you to. When the code don't do what is expected, you are close to a bug.

Kornfeld Eliyahu Peter · Accepted Answer · 2016-12-04T09:06:00

In contrast to your sample, where you are run from 1 to 10 on one axis and from 1 to n on the other, you run from 1 to n on both axis in your code...

Change the inner loop to run up to 10, and for the readability add a tab after each number printed...

C++

#include <iostream>

using namespace std;
 
int main()
{
    int num, b, c, d;
 
    cout << "Enter an  number to get the  multiplication table from 1 to that number" << endl;
    cin >> num;
    
    for (b = 1; b <= num; b++)
    { 
        for(c = 1; c <= 10; c++)
        {
            d = b * c;

            cout << d << "\t";
        }
        cout << endl;
    }

    return 0;
}</iostream>

I have problem using loop

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