Iterate over a vector using auto:

std::vector<int> a = {1, 2, 3};
for (auto item : a)
    printf("%d\n", a);

or

for (auto it = a.begin(); it != a.end(); ++it)
    printf("%d\n", *it);

And the optimize of loops:

vector<int>x;
for(int i=0;i<x.size();i++){
    //x[i]...
}

vector<int>x;
for(int i:x){
    //i...
}

Lambda also became available:

int cmp(int a,int b){
    return a%10<b%10;
}
...
sort(num+1,num+1+n,cmp);

sort(num+1,num+1+n,[](int a,int b){return a%10<b%10;});

As I don't use these features much, if you find mistakes in my code, please comment me.

Auto comment: topic has been updated by 040902fyn (previous revision, new revision, compare).