最简单的C++代码，控制台输出Hello,World!-Simplest program,printf "Hello,World "

POJ试题 A+B Q: Where are the input and the output? A: Your program shall always read input stdin (Standard Input) and write output to stdout (Standard Output). For example, you can use scanf in C or cin in C++ to read stdin, and use printf in C

Converts the unsigned integer k to binary character form with a blank after every fourth digit. Result is in string s of length 39. Caution: If you want to save the string, you must move it. This is intended for use with printf, and you can hav