C language: int a = 322; printf("%c\n",a); How does C language castrate input characters that exceed the range of the ascii table

#include<stdio.h>
int main()

{
    
    
int a = 322;
char b;
b = a;
printf("%c\n",b);

return 0;
}

You can see that the result is B.
We convert 322 to hexadecimal, and the

result is 142. But char only supports two hexadecimal numbers, and the highest 1 will be castrated,
so the result of 42 compared to the ascii code table is B