Excercise about C++ arrays - Write a program to solve Pascal triangle

Excercise about C++ arrays - Write a program to solve Pascal triangle

Let's write one C++ program to display a table that represents a Pascal triangle of any size by  using two-dimensional array, In Pas... 10:48 AM

Let's write one C++ program to display a table that represents a Pascal triangle of any size by  using two-dimensional array,
In Pascal triangle, the first and the second rows are set to 1. Each element of the triangle (from the third row downward) is the sum of the element directly above it and the element to the left of the element directly above it.
See the example Pascal triangle(size=5) below:

1
1	1
1	2	1
1	3	3	1
1	4	6	4	1

Solution:

#include<iostream> 

#include<conio.h>
using namespace std; 
void printPascalTr(int size); 
int main() 
    {

     int size;
     cout<<"Enter Pascal triangle size:";
     cin>>size;
     printPascalTr(size);
     getch();
     return 0;
      }
       void printPascalTr(int size){ 

         int PascalTr[size][size]; 
         int row,col; 
         //assign zero to every array element 
         for(row=0;row<size;row++) 
            for(col=0;col<size;col++)  PascalTr[row][col]=0; 
         //first and second rows are set to 1s   
         PascalTr[0][0]=1; 
         PascalTr[1][0]=1; 
         PascalTr[1][1]=1; 
             for(row=2;row<size;row++){ 
              PascalTr[row][0]=1; 
              for(col=1;col<=row;col++){ 
                        PascalTr[row][col]=PascalTr[row-1][col-1]+PascalTr[row-1][col]; 
                                        } 
                            } 
          //display the Pascal Triangle 
          for(row=0;row<size;row++){ 
            for(col=0;col<=row;col++){                
                   printf("%d\t",PascalTr[row][col]); 
                   } 
            cout<<endl;   
            } 
            }