Can I use any other header file instead of <iostream> ?

Answer 1

You can use many headers, depending on what you want and need... Examples:
<string> - for strings
<cmath> - for mathematics
<iostream> - input output
etc.
If you want I can provide you with a link with all of the headers used in C++(C)

Oh, I just saw that you asked for a header instead of <iostream>... Sorry, you can use <stdio.h> for scanf() and printf() for C, and I guess <fstream> for C++

Answer 2

stdio.h

Answer 3

for I/O you can use <stdio.h>

Answer 4

Thai u very much