noi题库1.1~1.6答案

NOI / 1.1编程基础之输入输出
01:Hello, World!
答：
#include<bits/stdc++.h>
using namespace std;
int main(){
cout<<"Hello, World!";
return 0;
}

02:输出第二个整数
答：
#include<iostream>
using namespace std;
int main(){
   int a,b,c;
   cin>>a>>b>>c;
   cout<<b;
   return 0;
}

03:对齐输出
答：
#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
int a, b, c;
cin >> a >> b >> c;
// 可以三行合并为一行写完，不过太长了
cout << setw(8) << a << ' ';
cout << setw(8) << b << ' ';
cout << setw(8) << c;
return 0;
}

04:输出保留3位小数的浮点数
答
#include<iostream>
using namespace std;
int main(){
   float a;
   cin>>a;
   printf("%0.3f",a);

   return 0;
}

05:输出保留12位小数的浮点数
答：
#include<iostream>
using namespace std;
int main(){
   double a;
   cin>>a;
   printf("%0.12f",a);

   return 0;
}

06:空格分隔输出
答
#include<iostream>
using namespace std;
int main()
{
   int b;
   char c;
   float e;
   double a;
   cin>>c>>b>>e>>a;
   cout<<c<<" "<<b<<" ";
   printf("%0.6f ",e);
   printf("%0.6f ",a);
   return 0;
}

07:输出浮点数
答
#include <cstdio>
int main()
{
double f;
scanf("%lf", &f);
printf("%f\n%.5f\n%e\n%g", f, f, f, f);
return 0;
}

08:字符三角形
答
#include<iostream>
using namespace std;
int main()
{
   char a;
   cin>>a;

   cout<<" "<<a<<endl;
   cout<<" "<<a<<a<<a<<endl;
   cout<<a<<a<<a<<a<<a<<endl;
   return 0;
}

09:字符菱形
答
#include<iostream>
using namespace std;
int main()
{
   char a;
   cin>>a;

   cout<<" "<<a<<endl;
   cout<<" "<<a<<a<<a<<endl;
   cout<<a<<a<<a<<a<<a<<endl;
   cout<<" "<<a<<a<<a<<endl;
   cout<<" "<<a<<endl;
   return 0;
}

10:超级玛丽游戏
答因系统不相同，所以显示不出出来。（亲，请谅解。）看到的不是乱码，可直接复制上去。
#include<iostream>
using namespace std;
int main()
{
   cout<<" ********"<<endl;
   cout<<" ************"<<endl;
   cout<<" ####....#."<<endl;
   cout<<" #..###.....##...."<<endl;
   cout<<" ###.......###### ### ### ### ###"<<endl;
   cout<<" ........... #...# #...# #...# #...#"<<endl;
   cout<<" ##*####### #.#.# #.#.# #.#.# #.#.#"<<endl;
   cout<<" ####*******###### #.#.# #.#.# #.#.# #.#.#"<<endl;
   cout<<" ...#***.****.*###.... #...# #...# #...# #...#"<<endl;
   cout<<" ....**********##..... ### ### ### ###"<<endl;
   cout<<" ....**** *****...."<<endl;
   cout<<" #### ####"<<endl;
   cout<<" ###### ######"<<endl;
   cout<<"############################################################## ##################################"<<endl;
   cout<<"#...#......#.##...#......#.##...#......#.##------------------# #...#......#.##------------------#"<<endl;
   cout<<"###########################################------------------# ###############------------------#"<<endl;
   cout<<"#..#....#....##..#....#....##..#....#....##################### #..#....#....#####################"<<endl;
   cout<<"########################################## #----------# ############## #----------#"<<endl;
   cout<<"#.....#......##.....#......##.....#......# #----------# #.....#......# #----------#"<<endl;
   cout<<"########################################## #----------# ############## #----------#"<<endl;
   cout<<"#.#..#....#..##.#..#....#..##.#..#....#..# #----------# #.#..#....#..# #----------#"<<endl;
   cout<<"########################################## ############ ############## ############"<<endl;

   return 0;
}

NOI / 1.2编程基础之变量定义、赋值及转换
01
#include <iostream>
using namespace std;
int main()
{
int a;
short b;
cout << sizeof(a) << ' ' << sizeof b;
return 0;
}
2

#include<bits/stdc++.h>
using namespace std;
int main(){
   float a=1.0;
   double b=2.0;
   cout<<sizeof(a)<<' '<<sizeof(b)<<endl;
   return 0;
}
3

#include<bits/stdc++.h>
using namespace std;
int main(){
   bool a=1;
   char b=2;
   cout<<sizeof(a)<<' '<<sizeof(b)<<endl;
   return 0;
}
4

#include<bits/stdc++.h>
using namespace std;
int main(){
cout<<"D C"<<endl;
return 0;
}
5

#include<bits/stdc++.h>
using namespace std;
int main(){
cout<<"F E"<<endl;
return 0;
}
6

#include<bits/stdc++.h>
using namespace std;
int main(){
   int a,b;
   cin>>a>>b;
   printf("%.3lf%%",(double)b/a*100);//cout<<fixed<<setprecision(3)<<(double)b/a*100<<'%'<<endl;
   return 0;
}
7

#include<bits/stdc++.h>
using namespace std;
int main(){
   char a;
   scanf("%c",&a);
   printf("%d",a);
   return 0;
}
8

#include<bits/stdc++.h>
using namespace std;
int main(){
   int a;
   scanf("%d",&a);
   printf("%c",a);
   return 0;
}
9

#include<bits/stdc++.h>
using namespace std;
int main(){
   int a;
   bool b;
   cin>>a;
   a=b=a;
   cout<<a<<endl;
   return 0;
}
10

#include<bits/stdc++.h>
using namespace std;
int main(){
   char a[]="Hello, World!";
   cout<<sizeof(a)<<endl;
   return 0;
NOI / 1.3编程基础之算术表达式与顺序执行
01

#include<iostream>
using namespace std;
int main(){
int a,b;
cin>>a>>b;
cout<<a+b<< endl;
return 0;
}
02

#include<stdio.h>
#include<math.h>
int main()
{
   int a,b,c;
   scanf("%d %d %d",&a,&b,&c);
   printf("%d",(a+b)*c);
}
03

#include<stdio.h>
int main()
{
   int a,b,c;
   scanf("%d %d %d",&a,&b,&c);
   printf("%d",(a+b)/c);
}
04

#include<stdio.h>
int main()
{
   int a,b,c;
   scanf("%d %d",&a,&b);
   printf("%d %d",a/b,a%b);
}
05

#include<stdio.h>
int main()
{
   int a,b;
   scanf("%d %d",&a,&b);
   double c=((double)a)/((double)b);
   printf("%.9f",c);
}
06

#include<stdio.h>
int main()
{
   int a,b;
   scanf("%d %d",&a,&b);
   double c;
   c=((double)b)/((double)a)*100;
   printf("%.3f%%",c);
}
07

#include<stdio.h>
#include<math.h>
int main()
{
   double a,b,c,d,x;
   scanf("%lf %lf %lf %lf %lf",&x,&a,&b,&c,&d);
   double result;
   result=a*pow(x,3)+b*pow(x,2)+c*x+d;
   printf("%.7lf",result);
}
08

#include<stdio.h>
#include<math.h>
int main()
{
   double f,c;
   scanf("%lf",&f);
   c=5*(f-32)/9;
   printf("%.5f",c);
}
09

#include<stdio.h>
#include<math.h>
#define pi 3.14159
int main()
{
   double r;
   scanf("%lf",&r);
   printf("%.4f %.4f %.4f",2*r,2*pi*r,pi*r*r);
}
10