Write a C program to get ARMSTRONG numbers upto given number

#include
#include
main()
{
int n=1000;
int a,b,c,d;
printf("Armstrong numbers upto 1000 are:\n");
for(a=1;a<=n;a++)
{
b=a;
d=0;
while(b>0)
{
c=b%10;
d=d+pow(c,3);
b=b/10;
}
if(d==a)
printf("\t%d\n",a);
}
}