#include<iostream> #include<cstring> using namespace std; int main(){ //strcpy( , ) 将字符数组~复值给~ //strcat( , ) 字符数组拼接 //strcmp(a,b) a>b cout<<"1" a==b cout<<"0" a<b cout<<"-1"; char n[100]; cin>>n; int e=strlen(n); char y=n[0]; for(int i=0;i<e;i++){ if(n[i]>='0' and n[i]<='9'){ if(y<n[i]){ y=n[i]; } } } cout<<y; return 0; }