4.4

4.13

int i;   double d;d = i = 3.5; // i = 3, d = 3.0i = d = 3.5; // d = 3.5, i = 3

4.14

if (42 = i)   // complie error: expression is not assignableif (i = 42)   // 没有错误，但是应该是i==42吧？

4.15

double dval; int ival; int *pi;dval = ival = pi = 0;//pi是指针 ，不能这样

改正

dval = ival = 0;pi = 0;

4.16

if (p = getPtr() != 0)if (i = 1024)改正：：if ((p=getPtr()) != 0)if (i == 1024)