Program to print the Star pattern 6 (Right-angled Triangle)

#include <stdio.h>
void main()
{
int n, c, k;
clrscr();
printf("Enter number of rows: ");
scanf("%d",&n);
for ( c = 1 ; c <= n ; c++ )
{
for( k = 1 ; k <= c ; k++ )
printf("*");
printf("\n");
}
getch();
}

Program to print the Star pattern 5 (Diamond)

#include <stdio.h>
void main()
{
int n, c, k, space = 1;
clrscr();
printf("Enter the number of rows in Diamond:");
scanf("%d", &n);
space = n - 1;
for (k = 1; k <= n; k++)
{
for (c = 1; c <= space; c++)
printf(" ");
space--;
for (c = 1; c <= 2*k-1; c++)
printf("*");
printf("\n");
}
space = 1;
for (k = 1; k <= n - 1; k++)
{
for (c = 1; c <= space; c++)
printf(" ");
space++;
for (c = 1 ; c <= 2*(n-k)-1; c++)
printf("*");
printf("\n");
}
getch();
}

Program to print the Star pattern 4 (Pyramid)

#include <stdio.h>
void main()
{
int row, c, n, temp;
clrscr();
printf("Enter the number of rows in Pyramid: ");
scanf("%d",&n);
temp = n;
for ( row = 1 ; row <= n ; row++ )
{
for ( c = 1 ; c < temp ; c++ )
printf(" ");
temp--;
for ( c = 1 ; c <= 2*row - 1 ; c++ )
printf("*");
printf("\n");
}
getch();
}

Program to print the Star pattern 3

#include<stdio.h>
main()
{
char prnt = '*';
int i, j, k, s, nos = -1;
clrscr();
for (i = 5; i >= 1; i--)
{
for (j = 1; j <= i; j++)
{ 
printf("%2c", prnt);
}
for (s = nos; s >= 1; s--)
{
printf("  ");
}
for (k = 1; k <= i; k++)
{
if (i == 5 && k == 5)
{   
continue;  
}  
printf("%2c", prnt); 
} 
nos = nos + 2; 
printf("\n");
}
nos = 5;
for (i = 2; i <= 5; i++)
{ 
for (j = 1; j <= i; j++)
{ 
printf("%2c", prnt);
}
for (s = nos; s >= 1; s--)
{  
printf("  "); 
} 
for (k = 1; k <= i; k++)
{  
if (i == 5 && k == 5)
{   
break;  
}  
printf("%2c", prnt); 
} 
nos = nos - 2; 
printf("\n");
}
getch();
}

Program to print the Star pattern 2

#include<stdio.h>
main()
{
char prnt = '*';
int i, j, k, s, c = 1, nos = 9;
clrscr();
for (i = 1; c <= 4; i++)
{
if ((i % 2) != 0)
{
for (j = 1; j <= i; j++)
{ 
printf("%2c", prnt);
}
for (s = nos; s >= 1; s--)
{
if (c == 4 && s == 1)
{
break;
}
printf("  ");
}
for (k = 1; k <= i; k++)
{
if (c == 4 && k == 5)
{
break;
}
printf("%2c", prnt);
}
printf("\n");
nos = nos - 4;
++c;
}
}
getch();
}

Program to print the Star pattern 1 (Right-angled Triangle)

#include<stdio.h>
main()
{
char prnt = '*';
int i, j, nos = 4, s;
clrscr();
for (i = 1; i <= 5; i++)
{
for (s = nos; s >= 1; s--)
{
printf("  ");
}
for (j = 1; j <= i; j++)
{
printf("%2c", prnt);
}
printf("\n");
  --nos;  
}
getch();
}