c++ - Instance object with a array -

i'm working in c++ class :

class foo { int ;     foo (){       = rand();     }      foo(int b){ a=b }  };  int main(){    foo * array = new foo[10]; //i want call constructor foo(int b)   // foo * array = new foo(4)[10]; ????  } 

please , :d

you should first correct syntax (put ;, make constructors public etc). then, can use uniform initialization in c++11, like

#include <iostream>  class foo { public:     int a;     foo () {     }     foo(int b) { = b; } }; int main()  {     foo * array = new foo[10] {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};     std::cout << array[2].a << std::endl; // ok, displays 2     delete[] array; } 

you should try avoiding altogether raw arrays, use std::vector (or std::array), or other standard container instead. example:

std::vector<foo> v{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}; 

or

std::vector v(10, 4); // 10 elements, initialized 4 

no need remember delete memory etc.