Use: cout << “a is ” << hex << (int) a <<“; b is ” << hex << (int) b << endl; And if you want padding with leading zeros then: #include <iomanip> … cout << “a is ” << setw(2) << setfill(‘0’) << hex << (int) a ; As we are using C-style casts, … Read more
The standard streams have a boolalpha flag that determines what gets displayed — when it’s false, they’ll display as 0 and 1. When it’s true, they’ll display as false and true. There’s also an std::boolalpha manipulator to set the flag, so this: #include <iostream> #include <iomanip> int main() { std::cout<<false<<“\n”; std::cout << std::boolalpha; std::cout<<false<<“\n”; return … Read more
Use std::fixed stream manipulator: cout<<fixed<<“Bas ana: “<<x<<“\tSon faiz: “<<t<<“\tSon ana: “<<x+t<<endl;
You need to include #include <string> #include <iostream>
Use: #include <iostream> … std::cout << std::hex << a; There are many other options to control the exact formatting of the output number, such as leading zeros and upper/lower case.
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
It doesn’t really print a blank, but most probably the ASCII character with value 5, which is non-printable (or invisible). There’s a number of invisible ASCII character codes, most of them below value 32, which is the blank actually. You have to convert aa to unsigned int to output the numeric value, since ostream& operator<<(ostream&, … Read more
add #include <iostream> to the start of io.cpp too.
Compile the program with: g++ -Wall -Wextra -Werror -c main.cpp -o main.o ^^^^^^^^^^^^^^^^^^^^ <- For listing all warnings when your code is compiled. as cout is present in the C++ standard library, which would need explicit linking with -lstdc++ when using gcc; g++ links the standard library by default. With gcc, (g++ should be preferred … Read more
With the following, #include <iomanip> #include <iostream> int main() { std::cout << std::setfill(‘0’) << std::setw(5) << 25; } the output will be 00025 setfill is set to the space character (‘ ‘) by default. setw sets the width of the field to be printed, and that’s it. If you are interested in knowing how the … Read more