以有效的方式重新分配内存

Question

可以使用旧块获取并初始化一个新的,可能更大的块,然后释放旧块.

purpose of that code ; reallocating the old memory area with new size

typeName is  Object 

Object *oldArray = objects ; // objects is pointer to old data block 
objects = new Object[ newCapacity ] ;
for ( int k = 0; k < theSize ; k++ ) 
    objects [k] = oldArray [k] ;
... // some other thing 
delete [] oldArray ;

还有其他方法可以有效地完成这项工作吗？

Answer 1

使用std::vector<Object>.它会自动为您完成此操作.