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basic_ostream::seekp

  • 아티클

Reset position in output stream.

basic_ostream<_Elem, _Tr>& seekp(
    pos_type _Pos
);
basic_ostream<_Elem, _Tr>& seekp(
    off_type _Off,
    ios_base::seekdir _Way
);

매개 변수

  • _Pos
    스트림 내의 위치입니다.

  • _Off
    The offset relative to _Way.

  • _Way
    One of the ios_base::seekdir enumerations.

반환 값

A reference to the basic_ostream object.

설명

If fail is false, the first member function calls newpos = rdbuf-> pubseekpos(_Pos), for some pos_type temporary object newpos. If fail is false, the second function calls newpos = rdbuf-> pubseekoff(_Off, _Way). In either case, if (off_type)newpos == (off_type)(-1) (the positioning operation fails), then the function calls istr.setstate(failbit). Both functions return *this.

예제

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

int main()
{
    using namespace std;
    ofstream x("basic_ostream_seekp.txt");
    streamoff i = x.tellp();
    cout << i << endl;
    x << "testing";
    i = x.tellp();
    cout << i << endl;
    x.seekp(2);   // Put char in third char position in file
    x << " ";

    x.seekp(2, ios::end);   // Put char two after end of file
    x << "z";
}

요구 사항

Header: <ostream>

네임스페이스: std

참고 항목

참조

basic_ostream 클래스

iostream 프로그래밍

iostreams 규칙