c++ - IntelliSense:类型 "void"的值不能分配给类型 "double"的实体

Question

因此，我删除并重新输入了错误所指的行，关闭并重新打开了 visual studio，并查看了此处发布的几个显示与我的措辞相同/相似的错误。

我感觉这是 visual studio 的一个错误，因为即使在我删除所有代码、保存和重新编译之后，它在同一行上给出了一个不再存在的错误。

"IntelliSense: a value of type "void" cannot be assigned to an entity of type "double""

以防万一这不是 studio 的错误，我想我会询问有关我的代码中的什么可能导致此错误的任何想法？代码中间的 block 引号是它引用该错误的行。

#include <iostream>
#include <vector>
#include <string>

using namespace std;

int main ()
{
   //Declarations of vectors and basic holders for input transfer
   vector<string> candidateName;
   string inputString;
   vector<int> candidateVotes;
   int counter,inputInt,totaledVotes;
   double percentage;
   vector<double> candidatePercentage;
   //Method declaration for calculations
   void calculatePercentage (int, int, int);

   //User input to gather number of candidates, names, and votes received.
   cout <<"How many candidates need to be input?";
   cin>>counter;
   for(int i = 0;i<counter;i++)
   {
      cout<<"Please enter the candidate's last name.";
      cin>>inputString;
      candidateName.push_back(inputString);
      cout<<"Please enter the number of votes "<<candidateName[i]<<" received.";
      cin>>inputInt;
      candidateVotes.push_back(inputInt);
      totaledVotes+=candidateVotes[i];
   }
   for(int i = 0;i<counter;i++)
   {
      //Problem here vvv
      percentage = calculatePercentage(totaledVotes, candidateVotes[i], i);
      //Problem there ^^^

      candidatePercentage.push_back(percentage);
   }
}

double calculatePercentage (int totalVotes, int candidateVotes, int rosterNumber)
{
   int percentage;
   percentage = candidateVotes/totalVotes;
   percentage*=100;
   return percentage;
}

Answer 1

你有这个声明

void calculatePercentage (int, int, int);

然后你做

percentage = calculatePercentage(totaledVotes, candidateVotes[i], i);

但是您只是声明该函数不返回任何内容。

而且后面也不符合实际的定义:

double calculatePercentage (int totalVotes, int candidateVotes, int rosterNumber)