我想问一下我的问题我试图读取Getline和EOF问题,但没有帮助。getline和一次测试EOF
问题是我不知道哪里可能会出现错误: 使用函数(getline或检查EOF)是否存在一些问题?
如果text.txt文件中没有文本,则表示发现了某些内容。但我不知道为什么或在哪里我犯了一个错误...
我想要的是:搜索字符串,如果txt文件中没有文本我希望它说EOF或其他东西。它仍然认为 - 即使文件是空的 - 字符串我一直在寻找一条线被发现,位置的一个 - 例如
我puting有代码:
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int openFile(void);
int closeFile(void);
int getTime(void);
int findTime();
int findDate();
int stringFind(string);
bool getOneLine(void);
string what;
bool ifound = false;
string foundstring;
string filename ;
fstream inputfile;
string sentence ;
size_t found ;
string foundTime ;
string foundDate ;
bool timeIsHere = false;
bool dateIsHere = false;
int iterTime = 0;
int iterDate = 0;
int line = 0;
int main (void){
sentence.clear();
cout << " Enter the file name:" << endl;
openFile();
while (getOneLine() != false) {
stringFind("Time");
}
cout << "END OF PROGRAM" << endl;
system("PAUSE");
///getTime();
closeFile();
system("PAUSE");
}
int closeFile(void) {
inputfile.close();
cout << " File: " << filename << " - was closed...";
return 0;
}
int openFile(void) {
cout << " Insert file name in program directory or full path to desired file you want to edit:"<<endl;
cout << " Do not use path with a space in directory address or filename ! " << endl;
cout<<" ";
getline(cin, filename);
inputfile.open(filename, ios::in);
cout <<" file_state: " << inputfile.fail();
if (inputfile.fail() == 1) {
cout << " - Cannot open your file" << endl;
}
else cout << " - File was openned sucesfully"<< endl;
return 0;
}
int stringFind(string what) {
cout << " I am looking for:" << what << endl;
found = what.find(sentence);
if (found == string::npos) {
cout << " I could not find this string " << endl;
}
else if(found != string::npos){
cout << " substring was found in line: " << line + 1 << " position: " << found + 1 << endl << endl;
ifound = true;
foundstring = sentence;
}
return 0;
}
bool getOneLine(void) {
if (inputfile.eof()) {
cout << "END OF FILE" << endl << endl;
return false;
}
else{
getline(inputfile, sentence);
cout << "next sentence is: "<< sentence << endl;
return true;
}
}
我是新手,我没有一个人要问 - 亲自。我试图编辑While循环和IF,以确保我没有犯一个严重的错误,但我不知道。
我试过了,例如sample.txt,这个文件是空的。
这可能有用的信息:https://stackoverflow.com/questions/5605125/why-is-iostreameof-inside-a-loop-condition-considered-wrong – Galik