Openjudge 题解01~05 C++

01.原题
代码:

#include<iostream>using namespace std;int main(){    cout<<"Hello, World!"<<endl;    return 0;}

02.原题
代码:

#include<iostream>#include<cstdio>using namespace std;int main(){    int a,b,c;    scanf("%d%d%d",&a,&b,&c);    cout<<b<<endl;    return 0;}

03.原题
代码:

#include<cstdio>using namespace std;int main(){    int a,b,c;    scanf("%d%d%d",&a,&b,&c);    printf("%8d %8d %8d",a,b,c);    return 0;}

04.原题
代码:

#include<cstdio>#include<iostream>using namespace std;int main(){    float a;    cin>>a;    printf("%.3f",a);    return 0;}

05.原题
代码:

#include<cstdio>#include<iostream>using namespace std;int main(){    double a;    cin>>a;    printf("%.12lf",a);    return 0;}