题目描述 A+B Coming Time Limit: 1000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 4554    Accepted Submission(s): 2917 Problem Description Many class

#include<iostream> #include<string> using namespace std; int fun(char ch) {  if(ch>='0'&&ch<='9') return ch-'0'; //把16进制中0-9转换成数字。 else { ch=toupper(ch); //int toupper(int c); 用法：#include