August 2021
Intermediate to advanced
450 pages
9h 36m
Chinese
Content preview from C++程序设计：原理与实践（基础篇）（原书第2版）
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3.6 复合赋值运算符
一个变量的递加（增加1）在程序中很常用，C++为它提供了一个特定的语法。例如：
意味着
有很多其他的常用方式，可以基于变量的当前值来修改它。例如，我们可能想将它加7、减9或乘2。C++直接支持这些运算。例如：
通常，对很多二元运算符oper，a per=b意味着a=a oper b（附录A.5）。对于初学者，只需掌握运算符+=、-=、*=、/=和%＝。这样提供了一种非常好的、紧凑的表示方法，可直接反映我们的意图。例如，在很多应用领域中，*=和/=被认为是“缩放”。
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