Question

如何使用c++中从文件中删除一行信息csdn

Answer 1

#include <fstream>
#include <string>

using namespace std;

int main()
{
vector<string> vecContent;
string strLine;
ifstream inFile("e:\\test.txt");
while (inFile)
{
getline(inFile, strLine);
vecContent.push_back(strLine);
}
inFile.close();

// 删除第一行
vecContent.erase(vecContent.begin());

ofstream outFile("e:\\test.txt");
vector<string>::const_iterator iter = vecContent.begin();
for (; vecContent.end() != iter; ++iter)
{
outFile.write((*iter).c_str(), (*iter).size());
outFile << '\n';
}

outFile.close();

return 0;
}

Answer 2

直接调用win API : BOOL DeleteFile(LPCTSTR lpFileName);//lpFileName是文件名 #include int main(void){

DeleteFile("c:\\p3.dat");//这里假设p3.dat在C盘根目录

return 0;
}