#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int x=3; int y =++x; cout<<"x="<<x<<endl; cout<<"y="<<y<<endl; int a=3; int b =++a; cout<<"a="<<a<<endl; cout<<"b="<<b<<endl; int c=5; int d =c--; cout<<"c="<<c<<endl; cout<<"d="<<d<<endl; int e=5; int f=--c; cout<<"e="<<e<<endl; cout<<"f="<<f<<endl; cout<<"年"<<endl; int age; cin>>age; if(age<12){ cout<<"小,别玩"<<endl; }else if(age<18){ cout<<"少，好学"<<endl; }else if(age<35){ cout<<"加油，年轻"<<endl; }else if(age<60){ cout<<"加油,中年"<<endl; }else { cout<<"好休,老年"<<endl; } int i =1;//先执行，后判断 do{ cout<<i<<" "; i++; }while(i<11); int sum =0; for(int i=1;i<=10;i++) { sum+=i; } cout<<"sum="<<sum; for(int i=0;i<3;i++){ for(int j=0;j<4;j++){ cout<<"*"; } cout<<endl; } for(int i=0;i<2;i++){ for(int j=0;j<3;j++){ cout<<"Hello World"; } cout<<endl; } int m,n; cin>>m>>n; for(m,m<n;m++){ if(m%2!=0){ sum+=m; } } cout<<sum; int a,b; cin>>a>>b; cout<<a+b<<endl; int N,a,b; cin>>N>>a>>b; cout<<N<<a+b; return 0; }