max() of two vectors

[landlord2017]

I thought max() function is to get the maximum between two values. But today I saw it can take in two vectors as below:

vector<int> a,b,c;
c=max(a,b);

So what would be in c?

L

[Thomas1965]

Why don't you try it ?

[JLBorges]

Vectors are LessThanComparable http://en.cppreference.com/w/cpp/concept/LessThanComparable

See: http://en.cppreference.com/w/cpp/container/vector/operator_cmp

[landlord2017]

I tried, but not sure whether my understanding is correct based on the result.

a={1,2,3,4};
b={1,2,3,1};
max(a,b) will be {1,2,3,4};

a={1,4,3,1};
b={1,2,3,1};
max(a,b) will be {1,4,3,1};

a={1,2,3,1};
b={1,2,4,1};
max(a,b) will be {1,2,4,1};

It seems the max() return the vector who is the first has the larger element by comparing from left hand side.

Am I correct?

L

[gunnerfunner]

yes, it's a lexicographical compare, just like in a dictionary