Instruction: Explain the functions of each code per line to get the desired result.

C++ Programming: From Problem Analysis to Program Design
8th Edition
ISBN:9781337102087
Author:D. S. Malik
Publisher:D. S. Malik
Chapter12: Points, Classes, Virtual Functions And Abstract Classes
Section: Chapter Questions
Problem 17SA
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Instruction: Explain the functions of each code per line to get the desired result.

#include <iostream>
using namespace std;

int main(){
    int r;
    


        cout<<"Enter number of patterns: ";
        cin>>r;
        
    for(int i = 1; i<=r; ++i)
    {
        for(int j = 1; j<= i; ++j)
        {
            cout<<j<<" ";
        }
        cout<<"\n";
    }
            cout<<"\n";

    for(int i = r; i>= 1; --i) 
    {
        for(int j = 1; j<=i; ++j)
        {
            cout<<j<<" ";
            
        }
        cout<<endl;
    }
    return 0;
    
}

Enter number of patterns: 6
1
12
1 2 3
1 2 3 4
1 2 3 4 5
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5
1 2 3 4
1 2 3
12
1
Process exited after 2.195 seconds with return value Ⓒ
Press any key to continue . .
Transcribed Image Text:Enter number of patterns: 6 1 12 1 2 3 1 2 3 4 1 2 3 4 5 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 1 2 3 4 1 2 3 12 1 Process exited after 2.195 seconds with return value Ⓒ Press any key to continue . .
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