We have not been taught all this

#1

what is pair<string,int> ?
what is emp[i].first used for ?
if he has made a pair of string and int then why has he used string for salary?
i am not able to understand the solution to this problem as we are not taught many things that are used in this video.

#2

pair belongs to the STL in which you can use two inputs at a time, like for eg, in the question, you are given a string value and an integer, that need to be taken together , thus for eg, if you declare the STL as,
pair<string,int> employees[100005];,
after that you will input the values as,
cin>>name>>salary;
employees[i].first=name;
employees[i].second=salary;

#3

and why did he make a separate string for name and salary?

#4

Because you are supposed to take two inputs, one as the name of person and other as the salary , thus you need to create two separate variables, one as a string type and other as the integer type. I hope you understood the logic for this…

#5

ya but he made both the variables of string type only

#6

Actually, you can use both as strings also, since you can represent the nos as strings as well, its totally your choice how you wanna take it, either as a integer or as a string, in both ways the answer will be accepted.