This program will demonstrate how a triangle can be printed using nested loops within the command line output of a console application.
Let us begin with the headers.
//WinterNurf Productions
#include<stdio.h>
#include<conio.h>
We now begin the main() function and declare two loop control variables.
int main()
{
//Declare loop cotrol variables
inti = 0;
intj = 0;
To display the triangle, we will need to print a character on the screen. Any character can be used here. However, we have used the ASCII value of 221 in this example as it provides a nice visual touch.
//Declare and initialize the character to be displayed
charchDisplay = 221;
We will now create the outer loop of our nested loop. This will be used to iterate rows (as our triangle is essentially a matrix of pixels).
//Create an outer loop to iterate rows
for(i = 0; i <= 30; i += 2)
{
Within the loop, we first print a newline character. This is used to complete printing one row and bring the cursor to the next row.
//Print a newline character
printf ("\n ");
We will create two inner loops. The first one will be used to print spaces (because we want some space before printing our character).
//Create an inner loop and print spaces
for(j = 30; j >= i; j -= 2)
printf (" ");
The second inner loop is used to print the actual triangle.
//Create another loop to print the triangle
for(j = 0; j <= i; j++)
printf ("%c ", chDisplay);
}
Thats't it! We now end the program.
_getch();
return 0;
}
Here is the full code.
//WinterNurf Productions
#include<stdio.h>
#include<conio.h>
int main()
{
//Declare loop cotrol variables
inti = 0;
intj = 0;
//Declare and initialize the character to be displayed
charchDisplay = 221;
//Create an outer loop to iterate rows
for(i = 0; i <= 30; i += 2)
{
//Print a newline character
printf ("\n ");
//Create an inner loop and print spaces
for(j = 30; j >= i; j -= 2)
printf (" ");
//Create another loop to print the triangle
for(j = 0; j <= i; j++)
printf ("%c ", chDisplay);
}
_getch();
return 0;
}
This program has been written in Microsoft Visual Studio for Desktop. It may not work in older compilers. However, simple editing will make the code compatible.
