jc24

写一个vector 时候，当写到operator= 时候，总是出现一个运行时错误，如下：Windows has triggered a breakpoint in myVector.exe.This may be due to a corruption of the heap, which indicates a bug in myVector.exe or any of the DLLs it has loaded.This may also be due to the user pressing F12 while myVector.exe has focus.The output win Read More

double* p0; //uninitialized:likely troubledouble* p1 = new double; //get(allocate)an unintialized doubledouble* p2 = new double(5.5); //get a double initialized to 5.5double* p3 = new double[5]; //get(allocate)5 uninitialized doubles Read More

sizeof 用于用于一个类型名 或 表达式。对一个类型名来说，sizeof给出这种类型对象的大小；对于一个表达式来说，sizeof给出表达式结果的大小。sizeof 结果是一个正整数，sizeof（char） 单元大小被定义为1。 Read More