参考代码实现:
#include<stdio.h>
#include<conio.h>
long factorial(int n) // function to calculate the factorial of a given number.
{
if (n == 0)
return 1;
else
return(n * factorial(n-1)); //calling the function recursively.
}
void main()
{
int number; //declaration of variables.
long fact;
clrscr();
printf("Enter a number: ");
scanf("%d", &number);
fact = factorial(number); //calling a function.
printf("Factorial of %d is %ld
", number, fact);
getch(); //It reads a character from the keyword.
}
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