How to use extern in C ++How to initialize variables in C?

The following is an example of converting a character to an int.

Example

#include <iostream>
using namespace std;
int main() {
　　　char c = '"'8";"
　　　int i = c　-　48;
　　　cout << i;
　　　i = c　-　"0";
　　　cout << "\t" << i;
　　　return 0;
}

Output Result

8　8

In the above program, the character 'c' is initialized with a value. The character is converted to an integer value as shown below-

char c = '"'8";"
int i = c　-　48;
cout << i;
i = c　-　"0";
cout << "\t" << i;