c++ 如何用getline()实现指定位置文本的读取？

#include <iostream>

#include <fstream>

#include <string>

#include <vector>

using namespace std

int main()

{

ifstream inFile("1.txt")

vector<string>v

string s

while(getline(inFile, s))

v.push_back(s)

inFile.close()

int n

cout <<"输入要读的行数: "

cin >>n

try {

cout <<"该行内容为: " <<v.at(n-1)

} catch (const exception&e) {

cerr <<e.what()

}

}

***********************************************************************

逐行进行文件读取:

hello MMM

Input terminated by data mismatch.

Press any key to continue

***********************************************************************

#include <iostream>

#include <fstream>

using namespace std

void main(void) {

const getline_size = 10

fstream file

file.open("e:\\litcool.txt",ios::out)//在e根目录下生成一个litcool.txt的文件

file<<"hello MMMM university"<<'\n'<<"in tianjin."

file.close()

file.open("e:\\litcool.txt",ios::in)

cout<<"逐行进行文件读取:"<<endl

char temp[100]

while(file.good()) { //这儿有改动

file.getline(temp, getline_size)// 这儿也有

cout<<temp<<endl

}

if(file.eof()) cout <<"End of file reached.\n"

else if(file.fail()) cout <<"Input terminated by data mismatch.\n"// 由于输入数据失配而结束

else cout <<"Input terminated for unknown reason.\n"

cout<<endl

file.close()

}

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