openjudge 1.1编程基础之输入输出

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 {    int a,b,c;
5     cin>>a>>b>>c;
6     cout<<b<<endl;
7     return 0;
8 }

1 #include<cstdio>
2 #include<iostream>
3 using namespace std;
4 int main(){
5     int a,b,c;
6     cin>>a>>b>>c;
7     printf("%8d %8d %8d",a,b,c);
8     return 0;
9 }

 1 #include<iostream>
 2 #include<cstdio>
 3 using namespace std;
 4 int main()
 5 {
 6     float a;
 7     cin>>a;
 8     printf("%0.3f",a);
 9     return 0;
10 }

 1 #include<iostream>
 2 #include<cstdio>
 3 using namespace std;
 4 int main()
 5 {
 6     double a;
 7     cin>>a;
 8     printf("%0.12f",a);
 9     return 0;
10 }

 1 #include<iostream>
 2 #include<cstdio>
 3 using namespace std;
 4 int main()
 5 {
 6     double a;
 7     cin>>a;
 8     cout<<(int)a;
 9     return 0;
10 }

 1 #include<iostream>
 2 #include<cstdio>
 3 using namespace std;
 4 int main()
 5 {
 6     double a;
 7     scanf("%lf",&a);
 8     printf("%f\n%0.5f\n%e\n%g\n",a,a,a,a);
 9     return 0;
10 }

 1 #include<iostream>
 2 #include<cstdio>
 3 using namespace std;
 4 int main()
 5 {
 6     char a;
 7     cin>>a;
 8     cout<<" "<<" "<<a<<endl;
 9     cout<<" "<<a<<a<<a<<endl;
10     cout<<a<<a<<a<<a<<a<<endl;
11        return 0;
12 }

 1 #include<iostream>
 2 #include<cstdio>
 3 using namespace std;
 4 int main()
 5 {
 6     char a;
 7     cin>>a;
 8     cout<<" "<<" "<<a<<endl;
 9     cout<<" "<<a<<a<<a<<endl;
10     cout<<a<<a<<a<<a<<a<<endl;
11     cout<<" "<<a<<a<<a<<endl;
12     cout<<" "<<" "<<a<<endl;
13     return 0;
14 }