#include<cstdio>
#include<iostream>
using namespacestd;
int main(){
//數字字元5的輸出
printf("%c\n",'5'); //----------5
printf("%d\n",'5');//----------53
//數字字元5減去字元0的輸出
printf("%c\n",'5'-'0');//------
printf("%d\n",'5'-'0');//------5
//數字字元5加上數字0的輸出
printf("%c\n",'5'+0);//------5
printf("%d\n",'5'+0);//-----53
//數字字元5加上字元4的輸出
printf("%c\n",'5'+'4');//-----i
printf("%d\n",'5'+'4');//----105
//兩個數字字元相加減去字元0的輸出
printf("%c\n",'5'+'4'-'0');//----9
printf("%d\n",'5'+'4'-'0');//-----57
//過10的兩個字元相加減去字元0的輸出
printf("%c\n",'5'+'6'-'0');//----;
printf("%d\n",'5'+'6'-'0');//----59
//過10的兩個字元相加減去字元0再減數字10的輸出
printf("%c\n",'5'+'6'-'0'-10);//------1
printf("%d\n",'5'+'6'-'0'-10);//-----49
return 0;}