[Noi question Bank]1.1

this year Noip actually "each has two questions from Noi the question bank in the extraction and the original problem based on the use of ", do not brush the question how to do."

This is the first problem article, because the topic is too water directly on the code.

1.1 Input and output of the programming basis world! Hello,

Direct output "Hello, world!" according to test instructions Can.

#include <iostream>usingnamespace  std; int Main () {    cout<<"Hello, world! "<<Endl;     return 0 ;}

01.cpp 02 Outputs a second integer

Read into $a,b,c$, output $b$.

#include <iostream>usingnamespace  std; int Main () {    int  a,b,c;    CIN>>a>>b>>C;    cout<<b<<Endl;     return 0 ;}

02.cpp 03 aligning the output

The output statement should be printf ("%8d%8d%8d\n", a,b,c); .

#include <cstdio>usingnamespace  std; int Main () {    int  a,b,c;    scanf ("%d%d%d",&a,&b,&c);    printf ("%8d%8d%8d\n", a,b,c);     return 0 ;}

03.cpp 04 the output retains 3 decimal places floating-point number

The

      Output statement should be  printf ( Span style= "color: #800000;" >%.3f\n , x);  

#include <cstdio>usingnamespace  std; int Main () {    double  x;    scanf ("%lf",&x);    printf ("%.3f\n", x);     return 0 ;}

04.cpp05 The output retains 12 decimal places floating-point number

The

      Output statement should be  printf ( Span style= "color: #800000;" >%.12f\n , x);   and the variable x must be  double   type.

#include <cstdio>usingnamespace  std; int Main () {    double  x;    scanf ("%lf",&x);    printf ("%.12f\n", x);     return 0 ;}

05.cpp

[Noi question Bank]1.1