Print triangle pattern using asterix

CODING:
#include<stdio.h>
main()
{
int n, c, k = 2, j;

printf("Enter number of rows\n");
scanf("%d",&n);

for ( j = 1 ; j <= n ; j++ ){
for ( c = 1 ; c <= 2*n-k ; c++)
printf(" ");
k = k + 2;

for ( c = 1 ; c <= j ; c++)
printf("*   ");
printf("\n");
} 

getch();
return 0;
}