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Reports the current read position in the stream.

pos_type tellg( );

The current position in the stream.

If fail is false, the member function returns rdbuf -> pubseekoff(0, cur, in). Otherwise, it returns pos_type(-1).

// basic_istream_tellg.cpp
// compile with: /EHsc
#include <iostream>
#include <fstream>

int main()
    using namespace std;
    ifstream file;
    char c;
    streamoff i;"basic_istream_tellg.txt");
    i = file.tellg();
    file >> c;
    cout << c << " " << i << endl;

    i = file.tellg();
    file >> c;
    cout << c << " " << i << endl;

Header: <istream>

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