pop_back() & erase() demo

#include <iostream>#include <vector>#include "display_vector.h"using namespace std;int main(){    vector<string> svec = { "hello", "world", "river", "flows", "happy" };    svec.pop_back();    display_vector(svec);    svec.erase(svec.begin(), svec.begin()+2);    display_vector(svec);    return 0;}