23 January 2024

C++ 核心指南目录

“Make the length of a name roughly proportional to the length of its scope”




double sqrt(double x);   // return the square root of x; x must be non-negative

int length(const char* p);  // return the number of characters in a zero-terminated C-style string

int length_of_string(const char zero_terminated_array_of_char[])    // bad: verbose

int g;      // bad: global variable with a cryptic name

int open;   // bad: global variable with a short, popular name

p 做指针,用 x 做浮点变量是常见的约定,不太会产生混淆。