object vector c++ sort code example
Example 1: sort vector struct c++
struct data{
string word;
int number;
};
bool my_cmp(const data& a, const data& b)
{
return a.number < b.number;
}
std::sort(A.begin(), A.end(), my_cmp);
Example 2: sorting a vector of objects c++
struct MyStruct
{
int key;
std::string stringValue;
MyStruct(int k, const std::string& s) : key(k), stringValue(s) {}
};
struct less_than_key
{
inline bool operator() (const MyStruct& struct1, const MyStruct& struct2)
{
return (struct1.key < struct2.key);
}
};
std::vector < MyStruct > vec;
vec.push_back(MyStruct(4, "test"));
vec.push_back(MyStruct(3, "a"));
vec.push_back(MyStruct(2, "is"));
vec.push_back(MyStruct(1, "this"));
std::sort(vec.begin(), vec.end(), less_than_key());