[英]push_back of an integer doesn't work on my vector of strings
我试图并行推回 3 个向量,当我将push_back()
放入字符串向量时,出现此错误:
no instance of overloaded function "std::vector<_Ty, _Alloc>::push_back [with _Ty=std::string, _Alloc=std::allocator<std::string>]" matches the argument listC/C++(304)
ask3.cpp(38, 8): argument types are: (int)
ask3.cpp(38, 8): object type is: std::vector<std::string, std::allocator<std::string>>
这是我所在的代码块:
#include <iostream>
#include <fstream>
#include <sstream>
#include <vector>
#include <string>
using namespace std;
int main()
{
int length, count = 0, moviecount = 0, spacecount = 0;
;
vector<int> status, price;
vector<string> movies;
string FileName, text, line, dummy;
FileName = "MovieList.txt";
ifstream InFile;
InFile.open(FileName);
while (!InFile.eof()) {
getline(InFile, line);
text += line + "\n";
}
cout << text;
length = text.length();
for (int i = 0; i <= length; i++) {
if (text[i] == ' ') {
spacecount++;
}
}
if (spacecount == 2) {
moviecount = 1;
}
else if (spacecount > 2) {
int temp = spacecount;
temp = temp - 2;
temp = temp / 3;
moviecount = 1 + temp;
}
movies.push_back(moviecount); //<-- problem line
status.push_back(moviecount);
price.push_back(moviecount);
}
movies
是string
的向量,因此您不能直接推送int
。
如果您使用的是 C++11 或更高版本,则可以使用std::to_string
将整数转换为字符串。
另一种将整数转换为字符串的方法是使用std::stringstream
,如下所示:
std::stringstream ss;
ss << moviecount;
movies.push_back(ss.str());
这是因为您正试图将int
值推送到初始化为存储string
值的矢量movies
中。
不确定你想从这段代码中得到什么,但你可以像这样将向量的类型更改为 int : vector<int> movies
或在 push_back(std::to_string()
将 int 转换为字符串,如下所示: movies.push_back(std::to_string(moviecount))
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