Write a program in c++ to displaypascal’s triangle?

C++ Program to Print Pascal's Triangle

 #include<iostream> //header file

using namespace std;

//driver function  

int main()

{

   int r;/*declaring r for Number of rows*/

   cout << "Enter the number of rows : ";

   cin >> r;

   cout << endl;

   for (int a = 0; a < r; a++)

   {

       int value = 1;

       for (int b = 1; b < (r - a); b++) /*Printing the indentation space*/

       {

           cout << "   ";

       }

       for (int c = 0; c <= a; c++) /*Finding value of binomial coefficient*/

       {

           cout << "      " << value;

           value = value * (a - c) / (c + 1);

       }

       cout << endl << endl;

   }

   cout << endl;

   return 0;

}

Output

Enter the number of rows :  5

                 1

              1      1

           1      2      1

        1      3      3      1

     1      4      6      4      1

answer: a, c

divide any of the y values by x values and you will always get 3 is the most simple way i can put it for you.