Because each character has a numerical value in the ASCII table ("A"-"Z" [65-90], "A"-"Z" [97-122]),
Other ASCII references to this table, examples are as follows:
int a；
char str = ' A
scanf("%d "，& ampa)；
If (a & gtstr){
Printf ("Really! \ n ")；
} Otherwise {
Printf ("Fake! \ n ")；
}
You can also use the atoi(char *) function, which can convert characters into shapes.
For example:
void main()
{
int a；
char b；
If (a> Attoy (b))
{
... (your code)
}
}