64,654
社区成员
发帖
与我相关
我的任务
分享
ifstream fin(“a.txt”);
char line[100] = {0};
while(fin.getline(line, sizeof(line)))
{
}
#include <iostream>
#include <vector>
#include <string>
#include <fstream>
using namespace std;
int main(int argc,char **argv)
{
ifstream fin("D:\\test.txt");
vector<string> vec_str;
char line[100];
while(fin.getline(line, sizeof(line)))
{
//修改s或者让s为空
string s("222");
vec_str.push_back(s);
}
ofstream fout("D:\\test.txt",ios::trunc);
vector<string>::iterator ivec=vec_str.begin();
while(ivec!=vec_str.end())
{
fout<<(*ivec).c_str();
fout<<"\n";
++ivec;
}
return 0;
}
ifstream fin(“a.txt”);
ofstream fout("a.txt",ios::trunc);
char line[100] = {0};
while(fin.getline(line, sizeof(line)))
{
//修改,直接改line里面的内容,删除就清空line
fout<<line;
}
ifstream fin(“a.txt”);
ofstream fout("a.txt",||ios::trunc);
char line[100] = {0};
while(fin.getline(line, sizeof(line)))
{
//修改,直接改line里面的内容,删除就清空line
fout<<line;
}