CPP2022-01-Helloworld

1. #include<iostream>
2. using namespace std;
3. int main()
4. {
5.     cout<<"Hello, world!"<<endl;
6. return 0;
7. }

1. #include<iostream>
2. using namespace std;
3. int main()
4. {
5.     string a;
6.     cin>>a;
7.     cout<<a<<"，欢迎您加入C++课程学习编程，祝您收获满满！"<<endl;
8. return 0;
9. }

1. #include<iostream>
2. using namespace std;
3. int main()
4. {
5. int A,B,sum;
6.     cin>>A>>B;
7.     sum=A+B;
8.     cout<<sum<<endl;
9. return 0;
10. }

1. #include<iostream>
2. using namespace std;
3. int main()
4. {
5. int sum;
6. for(int i=1;i<=100;i++)
7.     {
8.         sum = sum+i;
9.     }
10.     cout<<sum<<endl;
11. return 0;
12. }

1. #include<iostream>
2. using namespace std;
3. int main()
4. {
5. int a,b,sum;
6.     cin>>a>>b;
7. for(int i=a;i<=b;i++)
8.     {
9.         sum=sum+i;
10.     }
11.     cout<<sum<<endl;
12. return 0;
13. }

1. #include<iostream>
2. using namespace std;
3. int main()
4. {
5. int a;
6.     cin>>a;
7. if(a==0)
8.     {
9.         cout<<"天纵奇才，吾辈楷模"<<endl;
10.     }
11. else if(a==1)
12.     {
13.         cout<<"疯...凡是伟大的天才都带有疯狂的特征"<<endl;
14.     }
15. else
16.     {
17.         cout<<"不是天才也不是疯子？呜呜呜，不要为难人家好不啦！"<<endl;
18.     }
19. return 0;
20. }

1. #include <bits/stdc++.h>
2. using namespace std;
3. int main () {
4. int n,ans=0,a[26];
5.     cin>>n;
6. for(int i=0;i<n;i++)
7.     {
8.      cin>>a[i];
9.      ans+=a[i];
10.   }
11.   sort(a,a+n);
12.   for(int i=n-1;i>=0;i--)
13.   {
14.     cout<<a[i];
15. if(i) cout<<" ";
16.   }
17.   printf("\n%d %.2f",ans,ans*1.0/n);
18. }

1. #include<iostream>
2. using namespace std;
3. int sum(int x,int y)
4. {
5. int sum=0;
6.     sum=x+y;
7. return sum;
8. }
9. int sumab(int x,int y)
10. {
11. int sum=0;
12. if(x>y)swap(x,y);
13. for(int i=x;i<=y;i++)
14.     {
15.         sum=sum+i;
16.     }
17. return sum;
18. }
19. int main()
20. {
21. int n,a,b;
22.     cin>>n;
23. for(int i=0;i<=n-1;i++)
24.     {
25.         cin>>a>>b;
26.         cout<<sum(a,b)<<" "<<sumab(a,b)<<endl;
27.     }
28. return 0;
29. }

1. #include <iostream>
2. using namespace std;
3. 
4. int main()
5. {
6.     cout<<"Data type          Number of bytes"<<endl;
7.     cout<<"-------------    --------------------"<<endl;
8.     cout<<"char               "<<sizeof(char)<<endl;
9.     cout<<"short int          "<<sizeof(short int)<<endl;
10.     cout<<"int                "<<sizeof(int)<<endl;
11.     cout<<"long int           "<<sizeof(long int)<<endl;
12.     cout<<"long long          "<<sizeof(long long)<<endl;
13.     cout<<"float              "<<sizeof(float)<<endl;
14.     cout<<"double             "<<sizeof(double)<<endl;
15.     cout<<"long double        "<<sizeof(long double);
16. 
17. return 0;
18. }