摘要： 先上一段代码：#include <iostream> using namespace std; int main(void) { int a = 1; const int *p = NULL; p = &a; int *q = p; // 错误 // error C2440: 'initializing' : cannot convert from 'const int *' to 'int *' // Conversion loses qualifiers q = &a; // (1) q = (int *)p; / 阅读全文