PROGRAM BIL.TRIANGULAR

#include
void trianguler (int);
main()
{
int n;
printf("Menampilkan bilangan trianguler\n");
printf("Masukkan bilangan ke n ="); scanf("%d", &n);
trianguler (n);
}
void trianguler (int n)
{
int a=0;
for (n=n;n>=1;n--)
{
printf("%d", n);
a=a+n;
if (n==1)
printf("=");
else
printf("+");
}
printf ("%d\n", a);
}