c – 删除数组指针?
发布时间:2020-12-16 10:30:25 所属栏目:百科 来源:网络整理
导读:如何删除为阵列模型分配的内存,名称?我尝试了每种方法,但是当我运行它时它总是崩溃. int main(){ vectorPerson* people; const int PERSON_SZ = 4; char * names[] = {"Jim","Fred","Harry","Linda"}; int ages[] = { 23,35,52,59 }; for (int i = 0; i PER
如何删除为阵列模型分配的内存,名称?我尝试了每种方法,但是当我运行它时它总是崩溃.
int main() { vector<Person*> people; const int PERSON_SZ = 4; char * names[] = {"Jim","Fred","Harry","Linda"}; int ages[] = { 23,35,52,59 }; for (int i = 0; i < PERSON_SZ; i++) { Person * temp = new Person(names[i],ages[i]); people.push_back(temp); } // A vector of Car pointers vector<Car*> cars; const int CAR_SZ = 3; char * models[] = { "Festiva","Ferrarri","Prius" }; srand(time(0)); for (int i = 0; i < CAR_SZ; i++) { Car * temp = new Car(models[i]); temp->set_driver(people[rand() % (people.size())]); temp->set_owner(people[rand() % (people.size())]); cars.push_back(temp); } for (int p = 0; p < people.size(); p++) { people[p]->increment_age(); } for (int c = 0; c < cars.size(); c++) { cars[c]->print(); } delete [] names; for ( int r = 0; r < CAR_SZ; ++r ) { delete [] models[r]; } return 0; } 解决方法
您没有使用new分配模型和名称,因此您无法删除它们.
两个数组都在堆栈上分配,并在函数返回时自动删除. (字符串)数组的内容(即字符串本身)存储在全局数据段中,根本不能释放.这也是危险的,因为编译器可能在程序的不同位置使用相同的字符串常量. (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |