#include <iostream>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */
double factorial(double a, double b ,double c ){
 return (double c);}
int main(int argc, char** argv) {
cout << "Input a number: ";
cin >>b;
for (a=1,c=1;a<=b;a++,c=a*(a+1));
cout << "The factorial is: " << factorial(c);
 system("PAUSE");
    return 0;
}



谢谢大神

楼主写的代码本掌柜实在是看不懂，还好有标题

#include <iostream>
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
double factorial(double a);
int main(int argc, char** argv) {
    std::cout << "Input a number: ";
    double a = 0;
    std::cin >> a;
    std::cout << "The factorial is: " << factorial(a) << "\n";
    system("PAUSE");
    return 0;
}
double factorial(double n){
    if (n <= 1)
        return 1;
    else
        return n * factorial(n-1);
}

PS：这个代码算是C++代码吧
楼主昨晚和小女朋友约会还在幸福中没回过神来吧