00汪汪00的博客

1.C11标准中的sizeof　　Constraints　　1 　Thesizeofoperator shall not be applied to an expression that has function type or an incomplete type, to the parenthesized name of such a type, or to an expression that designates a bit-field member. The_Alignofope...

1.C11中的side effect(副作用)　　Accessing a volatile object, modifying an object, modifying a file, or calling a function that does any of those operations are allside effects,which are changes in the state of the execution environment.Evaluationof an expre...

1.++i　　++i和等同于1 i = i + 1;2.i++　　i++可以等同于1 int temp = i; // 一个与i类型相同的临时变量2 i = i + 1;3.相同点和不同点　　相同点：i最后都会被加1；　　不同点：在i++中多了一个与i类型相同的临时变量，i++是右值，++i是左值。　　例子1： 1 int a = 1, b = 2; 2 int *pt; 3 pt = &a; 4 5 pt++ = &b; //

1.区分'A'和"A"　　'A'是一个字符常量，一个字节。"A"是字符串，两个字节，包括'A'和'\0'。即在编译时'A'就是相当于一个宏定义，一个常数，而"A"必须在内存中，有内存地址。//functionvoid example(char *tm);char buf;char *pt;pt = &buf;*pt = 'A'; // 正确pt = "A...