Initalization with {}
- The initialization of variables was uniform in C++11.
- {} initalization is always applicable
- {} init prevents narrowing conversion of implicit conversion of arithmetic values
- In C++14,
autowith{}always generatesinitializer_list.
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string str{"my String"}; // Direct init
string str = {"my String"}; // Copy init
char c{8};
int i{29};
float f{3.14};
vector<int> v={1,2,3,4};
set<int> mySet = {-10, 5, 1, 4, 5};
unordered_map<string,int> dict= { { "scotty",1 }, { "bhargav" , 2 } };
int intArray[] = {1,2,3,4,5};
Automatic type inference with auto
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auto it = v.begin();
type(it); //iterator
Initialize long long and floats
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long long int n = 0LL;
unsigned long long int n = 1ULL;
// Creating a double type variable
double a = 3.912348239293;
// Creating a float type variable
float b = 3.912348239293f;
to_string and stoi
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string s = to_string(123)
string s = to_string(12.5)
int n=stoi("123")