Cpp program to print hollow diamond star pattern

In this tutorial, we will discuss the concept of Cpp program to print hollow diamond star pattern

In this program, we are going to learn how to displayed hollow diamond star pattern using for loop in C++ programming language

Here, we display a hollow diamond star pattern program with coding using nested for loop and also we get input from the user using cin function in C++ language

the user can provide numbers as they wish and get the hollow diamond star pattern according to their input.

Display hollow diamond star pattern using for loop

Program 1

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

int main()
{
     int i,j,rows;
    cout<<"Enter the number of rows: \n";
    cin>>rows;

//print upper triangle
for(i=1; i<=rows; i++){
    for(j=rows; j>i; j--){
       cout<<" ";//print space
    }
    cout<<"*";//print star
    for(j=1; j<(i-1)*2; j++){
       cout<<" ";
    }
    if(i==1){
      cout<<"\n";
    }
    else{
      cout<<"*\n";
    }
}
//print lower triangle
for(i=rows-1; i>=1; i--){
    for(j=rows; j>i; j--){
       cout<<" ";//print space
    }
    cout<<"*";//print star
    for(j=1; j<(i-1)*2; j++){
      cout<<" ";
    }
    if(i==1){
      cout<<"\n";
    }
    else{
      cout<<"*\n";
    }
    }
getch();
    return 0;
}

When the above code executed, it produces the following results

Enter the number of rows: 6
          *
        *   *
      *       *
    *           *
  *               *
*                   *
  *                *
    *           *
      *       *
        *   *
          *

Display hollow diamond star pattern using while loop

In this program, we are going to learn how to displayed hollow diamond star pattern using while loop in C++ programming language

here, we display a hollow diamond star pattern program with coding using nested while loop and also we get input from the user using cin function in C++ language

the user can provide numbers as they wish and get the hollow diamond star pattern according to their input

Program 2

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

int main()
{
    int i,j, rows;
    cout<<"Enter the number of rows\n";
    cin>>rows;;
    i=1;
    while(i<=rows){//print upper triangle
    j=rows;
    while( j>i){
       cout<<" ";//print space
        j--;
    }
    cout<<"*";//print star
    j=1;
    while(j<(i-1)*2){
       cout<<" ";
        j++;
    }
    if(i==1){
      cout<<"\n";
    }
    else{
      cout<<"*\n";
    }
     i++;
}

//print lower triangle
    i=rows-1;
while(i>=1){
    j=rows;
    while(j>i){
       cout<<" ";//print space
        j--;
    }
    cout<<"*";//print star
    j=1;
    while(j<(i-1)*2){
       cout<<" ";
        j++;
    }
    if(i==1){
      cout<<"\n";
    }
    else{
      cout<<"*\n";
    }
     i--;
    }
getch();
    return 0;
}

When the above code executed, it produces the following results

Enter the number of rows: 6
          *
        *   *
      *       *
    *           *
  *               *
*                   *
  *                *
    *           *
      *       *
        *   *
          *

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