I have a weird problem about working with integers in C++. I wrote a simple program that sets a value to a variable and then prints it, but it is not working as expected. My program has only two lines of code: uint8_t aa = 5; cout << “value is ” << aa << endl; … Read more
I’m practicing using mulitple files and header files etc. So I have this project which takes two numbers and then adds them. Pretty simple. Here are my files: main.cpp #include <iostream> #include “add.h” int main() { int x = readNumber(); int y = readNumber(); writeAnswer(x + y); return(0); } io.cpp int readNumber() { int x; … Read more
Shall this be the example: #include <iostream> using namespace std; int main() { cout << “Hola, moondo.\n”; } It throws the error: gcc -c main.cpp gcc -o edit main.o main.o: In function `main’: main.cpp:(.text+0xa): undefined reference to `std::cout’ main.cpp:(.text+0xf): undefined reference to `std::basic_ostream<char,std::char_traits<char> >& std::operator<< <std::char_traits<char>>(std::basic_ostream<char, std::char_traits<char> >&, char const*)’ main.o: In function `__static_initialization_and_destruction_0(int,int)’: main.cpp:(.text+0x3d): … Read more
This question already has answers here: Print leading zeros with C++ output operator? (6 answers) Closed 1 year ago. I want cout to output an int with leading zeros, so the value 1 would be printed as 001 and the value 25 printed as 025. How can I do this? 7 Answers 7
How do I print out the contents of a std::vector to the screen? A solution that implements the following operator<< would be nice as well: template<container C, class T, String delim = “, “, String open = “[“, String close = “]”> std::ostream & operator<<(std::ostream & o, const C<T> & x) { // … What … Read more
How do I print out the contents of a std::vector to the screen? A solution that implements the following operator<< would be nice as well: template<container C, class T, String delim = “, “, String open = “[“, String close = “]”> std::ostream & operator<<(std::ostream & o, const C<T> & x) { // … What … Read more
In my earlier question I was printing a double using cout that got rounded when I wasn’t expecting it. How can I make cout print a double using full precision? 16 Answers 16
What is the difference between printf() and cout in C++? 16 Answers 16 I’m surprised that everyone in this question claims that std::cout is way better than printf, even if the question just asked for differences. Now, there is a difference – std::cout is C++, and printf is C (however, you can use it in … Read more
