This is a program to find factorial of a number. Compiled and Runed on a mobile. Used CppDroid.
//Code
int main()
{
int c, n, fact = 1;
printf("Enter a number to calculate its factorial\n");
scanf("%d", &n);
for (c = 1; c = n; c++)
fact = fact * c;
printf("Factorial of %d = %d\n", n, fact);
return 0;
}