strchr函数用法_c++ strchr函数_strchr函数原型(29)

x = 0;              // Assignment operators always have spaces around
                    // them.
x = -5;             // No spaces separating unary operators and their
++x;                // arguments.
if (x && !y)
  ...
v = w * x + y / z;  // Binary operators usually have spaces around them,
v = w*x + y/z;      // but it's okay to remove spaces around factors.
v = w * (x + z);    // Parentheses should have no spaces inside them.

模板和转换:

vector<string> x;           // No spaces inside the angle
y = static_cast<char*>(x);  // brackets (< and >), before
                            // <, or between >( in a cast.
vector<char *> x;           // Spaces between type and pointer are
                            // okay, but be consistent.
set<list<string> > x;       // C++ requires a space in > >.
set< list<string> > x;      // You may optionally make use
                            // symmetric spacing in < <.

垂直留白：垂直留白越少越好.

这不仅仅是规则而是原则问题了:不在万不得已,不要使用空行.尤其是:两个函数定义之间的空行不要超过2行,函数体首尾不要留空行,函数体中也不要随意添加空行.

基本原则是:同一屏可以显示的代码越多,越容易理解程序的控制流.当然,过于密集的代码块和过于疏松的代码块同样难看,取决于你的判断.但通常是垂直留白越少越好.

Warning:函数首尾不要有空行

void Function() {

  // Unnecessary blank lines before and after

}

Warning:代码块首尾不要有空行

while (condition) {
  // Unnecessary blank line after

}
if (condition) {

  // Unnecessary blank line before
}

if-else块之间空一行是可以接受的:

if (condition) {
  // Some lines of code too small to move to another function,
  // followed by a blank line.

} else {
  // Another block of code
}

译者(YuleFox)笔记:

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