In this tutorial, we will discuss the Cpp program to hollow triangle star pattern
We will learn how to create Floyd’s triangle hollow pattern in C++ language using nested for loop
Program 1
C++ program to display hollow right triangle star pattern
#include <iostream> #include <conio.h> using namespace std; int main() { int i,j,rows; cout << "Enter number of rows" << endl; cin>>rows; //get input from user for(i=1; i<=rows; i++){ for(j=1; j<=i; j++){ if(j==1 || j==i || i==rows){ cout<<"*"; } else{ cout<<" "; } } cout<<"\n"; } return 0; }
When the above code is executed, it produces the following results:
Program 2
C++ program to display hollow mirrored right triangle star pattern
#include <iostream> #include <conio.h> using namespace std; int main() { int i,j,rows; cout << "Enter the number of rows " << endl; cin>>rows;//get input from user for(i=1; i<=rows; i++){ //iterates for print row for(j=i; j<=rows; j++){ cout<<" ";//print space } for(j=1; j<=i; j++){ if(i==rows || j==1 || j==i) { cout<<"*"; } else{ cout<<" "; } } cout<<"\n"; } getch(); return 0; }
When the above code is executed, it produces the following results:
Program 3
C++ program to display hollow inverted right triangle star pattern
#include <iostream> #include <conio.h> using namespace std; int main() { int i,j,rows; cout << "Enter the number of rows" << endl; cin>>rows; //get input from user for(i=1; i<=rows; i++){//parent for loop //this for loop used to iterate rows for(j=i; j<=rows; j++) { if(i==1 || j==i|| j==rows ){ cout<<"*"; //print star } else{ cout<<" "; } } cout<<"\n";//move to next line } getch(); return 0; }
When the above code is executed, it produces the following results:
Program 4
C++ program to display hollow inverted mirrored right triangle star pattern
#include <iostream> #include <conio.h> using namespace std; int main() { int i,j,rows; cout << "Enter the number of rows" << endl; cin>>rows; //get input from user for(i=1; i<=rows; i++){//parent for loop //this for loop used to iterate rows for(j=1; j<=i; j++) { cout<<" "; //print space } for(j=i; j<=rows; j++) { if(i==1 || j==i|| j==rows ){ cout<<"*"; //print star } else{ cout<<" "; } } cout<<"\n";//move to next line } getch(); return 0; }
When the above code is executed, it produces the following results:
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