c++ - 函数错误的参数太多，即使我有一个参数数量正确的函数

Question

#include <iostream>
#include <cstdlib>

using namespace std;

unsigned int idiv_rec(unsigned int a, unsigned int b)
{
 if (b == 0) exit(EXIT_FAILURE);
 unsigned int l = 0, h = a;
 return idiv_rec(a, b, l, h);
}

unsigned int idiv_rec(  unsigned a,  unsigned b, unsigned &l, unsigned &h) {
 unsigned int m = (l + h) / 2;
 bool greater = m * b > a;
 h = greater ? m : h;
 l = greater ? l : m;

 if (h - l > 1)
  return idiv_rec(a, b, l, h);
 else
  return l;
}

它说

too many arguments to function 'unsigned int idiv_rec(unsigned int, unsigned int)'

我必须包含一些东西吗？

Answer 1

你遇到的问题是当你到达

return idiv_rec(a, b, l, h);

编译器还没有看到

unsigned int idiv_rec(  unsigned a,  unsigned b, unsigned &l, unsigned &h)

这意味着它不知道函数有 4 个参数版本。这就是为什么即使函数存在也会出现错误的原因。

你需要像这样转发声明

unsigned int idiv_rec(  unsigned a,  unsigned b, unsigned &l, unsigned &h);

之前

unsigned int idiv_rec(unsigned int a, unsigned int b)