This works using Visual Studio 2013: #include <io.h> #include <fcntl.h> #include <iostream> int main( int argc, char * argv[] ) { _setmode( _fileno( stdout ), _O_BINARY ); std::cout << std::endl; } It will output only [0A], and not [0D][0A].
NOTE: This experimental result is valid for MSVC. In some other implementation of library, the result will vary. printf could be (much) faster than cout. Although printf parses the format string in runtime, it requires much less function calls and actually needs small number of instruction to do a same job, comparing to cout. Here … Read more
If it is good enough to print to stderr, you can use the following streams originally intended for debugging: #include<QDebug> //qInfo is qt5.5+ only. qInfo() << “C++ Style Info Message”; qInfo( “C Style Info Message” ); qDebug() << “C++ Style Debug Message”; qDebug( “C Style Debug Message” ); qWarning() << “C++ Style Warning Message”; qWarning( … Read more
The compiler can evaluate the function printcbase() as this: void printcbase(cbase* b ){ int a = b->FooA(); // line 1 int b = b->FooB(); // line 2 std::cout << a; // line 3 std::cout << b; // line 4 stc::cout << std::endl; } or some of many permutatins of lines marked as 1 – 4. … Read more
You need std::fixed and std::setprecision: std::cout << std::fixed << std::setprecision(3) << a; These require following header: #include <iomanip>
Because int8_t is the same as signed char, and char is not treated as a number by the stream. Cast into e.g. int16_t std::cout << static_cast<int16_t>(value) << std::endl; and you’ll get the correct result.
Each has its own overheads. Depending on what you print, either may be faster. Here are two points that come to mind – printf() has to parse the “format” string and act upon it, which adds a cost. cout has a more complex inheritance hierarchy and passes around objects. In practice, the difference shouldn’t matter … Read more
From How to Hide Text: Windows #include <iostream> #include <string> #include <windows.h> using namespace std; int main() { HANDLE hStdin = GetStdHandle(STD_INPUT_HANDLE); DWORD mode = 0; GetConsoleMode(hStdin, &mode); SetConsoleMode(hStdin, mode & (~ENABLE_ECHO_INPUT)); string s; getline(cin, s); cout << s << endl; return 0; }//main cleanup: SetConsoleMode(hStdin, mode); tcsetattr(STDIN_FILENO, TCSANOW, &oldt); Linux #include <iostream> #include <string> … Read more
Use std::fixed stream manipulator: cout<<fixed<<“Bas ana: “<<x<<“\tSon faiz: “<<t<<“\tSon ana: “<<x+t<<endl;
Overload resolution selects the ostream& operator<<(ostream& o, const char *c); which is used for printing C-style strings. You want the other ostream& operator<<(ostream& o, const void *p); to be selected. You are probably best off with a cast here: cout << static_cast<void *>(cptr) << endl;