迭代向量字符串的字符(C++禁止指针和整数之间的比较)

Question

我试图迭代一个字符串向量,并在字符串的每个字符上:

但我得到一个错误:C++禁止指针和整数之间的比较.

In member function ‘int LetterStrings::sum(std::vector<std::basic_string<char> >)’:

error: ISO C++ forbids comparison between pointer and integer [-fpermissive]|

以下是我的代码:

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

using namespace std;

class LetterStrings {
    public:
        int sum(vector <string> s) {
            int i, j = 0;
            int count = 0;
            for(i=0;i<s.size();i++) {
                for(j=0;j<s[i].length();j++) {
                    if(s[i][j] != "-") {
                        count ++;
                    }
                }
            }
            return count;
        }
};

有人可以告诉我,我的代码有什么问题.

**我对C++很陌生.

Answer 1

你的问题在这里:

if(s[i][j] != "-")

它应该是:

if(s[i][j] != '-') // note the single quotes - double quotes denote a character string