In C++ is there a way to go to a specific line in a text file?

Question

If I open a text file using fstream is there a simple way to jump to a specific line, such as line 8?

Answer 1

Loop your way there.

#include <fstream> #include <limits>  std::fstream& GotoLine(std::fstream& file, unsigned int num){     file.seekg(std::ios::beg);     for(int i=0; i < num - 1; ++i){         file.ignore(std::numeric_limits<std::streamsize>::max(),'\n');     }     return file; } 

Sets the seek pointer of file to the beginning of line num.

Testing a file with the following content:

1 2 3 4 5 6 7 8 9 10 

Testprogram:

int main(){     using namespace std;     fstream file("bla.txt");      GotoLine(file, 8);      string line8;     file >> line8;      cout << line8;     cin.get();     return 0; } 

Output: 8