如何修复错误？？错误:在"factorial“之前需要";”？它在第16行写着

Question

我收到一个错误，不知道如何修复它。我的代码如下：

#include <iostream>
using namespace std;

int main(){
  int  factorial = 1, current = 2, n;
  cout << "enter number to calculate factorial of: ";
  cin >> n;

  while (current <= n){
    factorial = current * factorial;
    current++;
  }
  cout << n << "!= " factorial << endl;

  while (n < 0) {
    cout << "Must enter a positive number!\n";
    cout << "re-Enter number to calculate factorial of: ";
    cin >> n;
  }
  return 0;
}

Answer 1

您缺少一个运算符：

cout << n << "!= " factorial << endl;

应该是：

cout << n << "!= " << factorial << endl;