C++ Program to generate pascal’s triangle using Array

C++ Program to generate pascal’s triangle using Array

In this tutorial, we will discuss the C++ Program to generate a pascal’s triangle using the Array

In this post, we are going to learn how to display the pascal triangle number pattern in C++ language using a single dim array with for, while, and do-while loop

Program to generate pascal’s triangle

Program to display pascal triangle Using for loop

Program 1

in this program, the user declares and initializes some variables as integers and then the program will show the pascal triangle number pattern using for loop in the C++ language

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int arr[5],arrTemp[5],i=1,j=0,colNum,rowNum;
    //declare and initialize variables
    arr[0]=1;
    arr[1]=1;
//initialize array elements
    for(rowNum=0; rowNum<5; rowNum++)
        {
    for(colNum=4; colNum>rowNum; colNum--){
        cout<<" ";}//print space
             for(colNum=0; colNum<=rowNum; colNum++){
                 if(rowNum==0)
                    cout<<"1";//i the row is zero print "1"
                 else
                 {
                     if(colNum==0 || colNum==rowNum){
                        cout<<"1 ";}
                     else{
                        arrTemp[i]=arr[j]+arr[j+1];
                        cout<<arrTemp[i]<<" ";
                        //print number with space
                        i++;
                        j++;
                     }
                     }
                 }
cout<<endl;
 arrTemp[i]=1;
 if(rowNum>1)
    {
        j=0;
         arr[j]=1;
         for(j=1,i=1; j<=rowNum; j++, i++)
            arr[j]=arrTemp[i];
         i=1;
         j=0;
    }
    }
    cout<<endl;
    getch();
 return 0;
}

When the above code is executed, it produces the following result

 

Program to display pascal triangle Using while loop

Program 1

in this program, the user declares and initializes some variables as integers and then the program will show the pascal triangle number pattern using the While loop in the C++ language

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int arr[5],arrTemp[5],i=1,j=0,colNum,rowNum;
    //declare and initialize variables
    arr[0]=1;
    arr[1]=1;
//initialize array elements
    for(rowNum=0; rowNum<5; rowNum++)
        {
    for(colNum=4; colNum>rowNum; colNum--){
        cout<<" ";}//print space
             for(colNum=0; colNum<=rowNum; colNum++){
                 if(rowNum==0)
                    cout<<"1";//i the row is zero print "1"
                 else
                 {
                     if(colNum==0 || colNum==rowNum){
                        cout<<"1 ";}
                     else{
                        arrTemp[i]=arr[j]+arr[j+1];
                        cout<<arrTemp[i]<<" ";
                        //print number with space
                        i++;
                        j++;
                     }
                     }
                 }
cout<<endl;
 arrTemp[i]=1;
 if(rowNum>1)
    {
        j=0;
         arr[j]=1;
         for(j=1,i=1; j<=rowNum; j++, i++)
            arr[j]=arrTemp[i];
         i=1;
         j=0;
    }
    }
    cout<<endl;
    getch();
 return 0;
}

When the above code is executed, it produces the following result

 

Program to display pascal triangle Using do-while loop

Program 1

in this program, the user declares and initializes some variables as integers and then the program will display the pascal triangle number pattern using the do-while loop in the C++ language

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int arr[5],arrTemp[5],i=1,j=0,colNum,rowNum;
    //declare and initialize variables
    arr[0]=1;
    arr[1]=1;
//initialize array elements
rowNum=0;
        do{
            colNum=4;
    do{
        cout<<" ";//print space
         colNum--;
         }while(colNum>=rowNum);
         //print space
         colNum=0;
             do{
                 if(rowNum==0)
                    cout<<"1";// the row is zero print "1"
                 else
                 {
                     if(colNum==0 || colNum==rowNum){
                        cout<<"1 ";}
                     else{
                        arrTemp[i]=arr[j]+arr[j+1];
                        cout<<arrTemp[i]<<" ";
                        //print number with space
                        i++;
                        j++;
                     }
                     }
                      colNum++;
                 }while(colNum<=rowNum);
cout<<endl;
 arrTemp[i]=1;
 if(rowNum>1)
    {
        j=0;
         arr[j]=1;
         for(j=1,i=1; j<=rowNum; j++, i++)
            arr[j]=arrTemp[i];
         i=1;
         j=0;
    }
    rowNum++;
    }  while(rowNum<5);
    cout<<endl;
    getch();
 return 0;
}

When the above code is executed, it produces the following result

Suggested for you

For loop in C++ language               while loop in C++ language             Do while loop in C++ language

Nested for loop in C++ language     Nested while loop in C++  language

if statement in C++ language         Operator in C++ language

 

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