Question

我正在尝试计算文本文件中的行数，但每次运行此代码时，我都会得到1987121509作为行数。你能告诉我如何修改我的代码以获得正确的行数吗？谢谢。

以下是代码：

#include <iostream>
#include <string>
#include <fstream>
using namespace std;

int main()
{
string line;
int numLine;

ifstream dataFile;
dataFile.open("fileforstring.txt"); 

if(!dataFile)
{
    cout<<"Error opening file.";
}

else
{
    cout<<"File opened successfully";
}

while(getline(dataFile,line))
{
    ++numLine; //increment numLine each time a line is found
}

cout<<"\nNo of lines in text file is "<<numLine;

dataFile.close();

return 0;
}

Answer 1

这里有正确的代码（我在问到问题后发现了）没有正确初始化变量的愚蠢错误。

#include <iostream>
#include <string>
#include <fstream>
using namespace std;
int main()
{
string line;
int numLine = 0; //didn't set it to zero.
ifstream dataFile;
dataFile.open("fileforstring.txt");

if(!dataFile)
{
    cout<<"Error opening file.";
}

else
{
    cout<<"File opened successfully";
}

while(getline(dataFile,line))
{
    ++numLine;
}

cout<<"\nNo of lines in text file is "<<numLine;

dataFile.close();

return 0;
}

在c ++中计算文本文件中的文本行数时出错

1 个答案: