9-2 使用列表初始化

#include <string>

struct C
{
    C(std::string a, int b) {}
    C(int a) {};
}

void foo(C) {}
C bar()
{
    return {"world", 5};
}

int main()
{
    int x = {5};		//拷贝初始化
    int x2{8};			//直接初始化
    
    C c1 = {4};			//拷贝初始化
    C c2{5};			//直接初始化
    
    foo({8});			//拷贝初始化
    foo({"hello",8});	//直接初始化
    
    C c3 = bar();		//拷贝初始化
    C* c4 = new C{"hi", 43};	//直接初始化
}

#include <vector>
#include <list>
#include <set>
#include <map>
#include <string>

int main()
{
    int x1[] = {1,2,3,4,5};
    int x2[]{1,2,3,4,5};	
    
    std::vector<int> v1 = {1,2,3,4,5};
    std::vector<int> v2{1,2,3,4,5};
    
    std::list<int> l1 = {1,2,3,4,5};
    std::list<int> l2{1,2,3,4,5};
    
    std::set<int> s1 = {1,2,3,4,5};
    std::set<int> s2{1,2,3,4,5};
    
    std::map<std::string, int> m1 = {{"a",1}, {"b",2}, {"c",3}};
    std::map<std::string, int> m2{{"a",1}, {"b",2}, {"c",3}};
}