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std::istrst...::istrstream(3) C++ Standard Libarystd::istrst...::istrstream(3) NAME std::istrstream::istrstream - std::istrstream::istrstream Synopsis explicit istrstream(const char* s); (1) explicit istrstream(char* s); (2) istrstream(const char* s, std::streamsize n); (3) istrstream(char* s, std::streamsize n); (4) Constructs new istrstream and its underlying std::strstreambuf. 1,2) Constructs the underlying std::strstreambuf by calling strstreambuf(s,0) and initializes the base class with the address of the strstreambuf. The behavior is undefined if s is not pointing at an element of a null-terminated array. 3,4) Constructs the underlying std::strstreambuf by calling strstreambuf(s,n) and initializes the base class with the address of the strstreambuf. The behavior is undefined if s is not pointing at an element of an array whose length is at least n elements. Parameters s - C-string or char array to use as the contents of the stream n - size of the array Example // Run this code #include <iostream> #include <strstream> int main() { std::istrstream s1("1 2 3"); // string literal int n1,n2,n3; if(s1 >> n1 >> n2 >> n3) std::cout << n1 << ", " << n2 << ", " << n3 << '\n'; char arr[] = {'4', ' ', '5', ' ', '6'}; std::istrstream s2(arr, sizeof arr); if(s2 >> n1 >> n2 >> n3) std::cout << n1 << ", " << n2 << ", " << n3 << '\n'; } Output: 1, 2, 3 4, 5, 6 See also constructor constructs a strstreambuf object (public member function of std::strstreambuf) constructor constructs an strstream, optionally allocating the buffer (public member function of std::ostrstream) constructor constructs an strstream, optionally allocating the buffer (public member function of std::strstream) http://cppreference.com 2022.07.31 std::istrst...::istrstream(3)
NAME | Synopsis | Parameters | Example | Output: | See also
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