07-语言入门-07-A Famous Music Composer

2022-11-03 07:21:49

题目地址： http://blog.csdn.net/sevenmit/article/details/8231994

描述

Mr. B is a famous music composer. One of his most famous work was his set of preludes. These 24 pieces span the 24 musical keys (there are musically distinct 12 scale notes, and each may use major or minor tonality). The 12 distinct scale notes are:

A#=Bb

C#=Db

D#=Eb

F#=Gb

G#=Ab

Five of the notes have two alternate names, as is indicated above with equals sign. Thus, there are 17 possible names of scale notes, but only 12 musically distinct notes. When using one of these as the keynote for a musical key, we can further distinguish between major and minor tonalities. This gives 34 possible keys, of which 24 are musically distinct.

In naming his preludes, Mr. B used all the keys except the following 10, which were named instead by their alternate names:

Ab minor	A# major	A# minor	C# major	Db minor
D# major	D# minor	Gb major	Gb minor	G# major

Write a program that, given the name of a key, give an alternate name if it has one, or report the key name is unique.

输入
Each test case is described by one line having the format "note tonality", where "note" is one of the 17 names for the scale notes given above, and "tonality" is either "major" or "minor" (quotes for clarify).

输出
For each case output the required answer, following the format of the sample.

样例输入
Ab minor
D# major
G minor

样例输出
Case 1: G# minor
Case 2: Eb major
Case 3: UNIQUE

#include <stdio.h>
#include <string.h>

#define ARR_LEN 10

int main()
{
     char str1[ARR_LEN];
     char str2[ARR_LEN];
     int index = 0;
     while(scanf("%s %s",str1,str2) != EOF)
     {
          getchar();
          printf("Case %d: ",++index);
          if(strcmp(str1,"A#") == 0)
          {
               printf("Bb %s\n",str2);
          }
          else if(strcmp(str1,"Bb") == 0)
          {
               printf("A# %s\n",str2);
          }
          else if(strcmp(str1,"C#") == 0)
          {
               printf("Db %s\n",str2);
          }
          else if(strcmp(str1,"Db") == 0)
          {
               printf("C# %s\n",str2);
          }
          else if(strcmp(str1,"D#") == 0)
          {
               printf("Eb %s\n",str2);
          }
          else if(strcmp(str1,"Eb") == 0)
          {
               printf("D# %s\n",str2);
          }
          else if(strcmp(str1,"F#") == 0)
          {
               printf("Gb %s\n",str2);
          }
          else if(strcmp(str1,"Gb") == 0)
          {
               printf("F# %s\n",str2);
          }
          else if(strcmp(str1,"G#") == 0)
          {
               printf("Ab %s\n",str2);
          }
          else if(strcmp(str1,"Ab") == 0)
          {
               printf("G# %s\n",str2);
          }
          else
          {
               printf("UNIQUE\n");
          }
     }

     return 0;
}

注意：

1.英语真心没看懂，英语水平真是渣呀。

2.有更优秀的代码，感觉真心不错：

找到了转换的关系，一切交由代码决定。

#include<iostream>
#include<string>
using namespace std;
string trans(string a){
     string b="";
     if(a[1]=='#'){
          b+=char((a[0]-'A'+1)%7+'A');
          b+='b';
     }else{
          b+=char((a[0]-'A'+6)%7+'A');
          b+='#';
     }
     return b;
}
int main(){
     string a,b;
     for(int t=1; cin>>a>>b; t++){
          cout<<"Case "<<t<<": ";
          if(a.length()==1)
               cout<<"UNIQUE"<<endl;
          else
               cout<<trans(a)<<" "<<b<<endl;
     }
     return 0;
}

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