Please i need some explanation here. Program to display lowercase to uppercase letters. Guys thanks so much.

Question

Please can someone explain to me why static_cast<int> is use then after static_cast <char> is used. Why not to use satatic_cast <int> only or <char> only for both lines.
#include <iostream>
Using namespace std;
int main ()
{
char inchar, outchar;
int inIntchar, outIntchar;
cout << "enter the lowercase char" ;
cin >> inChar;

inIntchar = static_cast<int>(inChar);
outIntChar = inIntchar - 32;
outChar = static_cast<char>(outIntchar);
cout << "The uppercase letter you entered is" <<outChar;

Answer 1

Thanks guys. The explanation are helpful

Answer 2

I'm not familiar with c++, but I think that you need int for the ascii value of the lowercase char.
For example:
char input = b
int input = 98
int output = 98 - 32 = 66
char output = B

Ascii-table: https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.3.0/com.ibm.zos.v2r3.ioaq100/ascii_table.gif