歌曲信息管理系统

题目要求该系统应该具有下列功能：（1）歌曲信息包括歌曲名,作者,演唱者,发行年月等。

（2）可以对歌曲信息进行输入,删除,浏览。

（3）可以查询歌曲名,作者,演唱者信息。

（4）可以提供按作者分组显示功能。

（5）用文件存储信息。

输入要求:应用程序运行后，在屏幕上显示一个菜单。

用户根据需求，选定相应的操作项目。

进入每个操作后，根据应用程序的提示信息，从键盘输入相应的信息。

输出要求:要求用应用程序应用后，要在屏幕上显示一个菜单。

用户输入数据后，要给出清晰明确的提示信息，包括输入的数据内容、格式及结束方式等。

提示：设计时可采用结构体和一维数组类型，用来保存学生证的内容。

总体设计本题可采用结构体类型来保存学生证的内容，学生信息应该使用数组来进行过程中使用指针链表使其更方便。

根据要求,此程序需要设计以下几个模块：添加新歌曲模块，删除指定歌曲板块，修改指定歌曲显示，查询指定歌曲模块。

因此，可知其主要模式为：歌曲管理流程图具体设计，1、主函数歌曲的信息有歌曲名，作者，演唱者，发行年月。

因此用一个数组来保存学生证信息：struct song{char name[25];char writer[25];char singer[25];char year[25];}s[N],s1,s2,s3;menu( ) // 输入菜单int n;printf("\t****************************MENU****************************\n\n"); printf("\t\t\t 1.Enter record\n"); /*输入记录*/printf("\t\t\t 2.List the file\n"); /*显示记录*/printf("\t\t\t 3.Search record\n"); /*查找记录*/printf("\t\t\t 4.Delete a record\n"); /*删除记录*/printf("\t\t\t 5.Add a record\n"); /*插入记录*/printf("\t\t\t 6.save the file\n"); /*保存文件*/printf("\t\t\t 7.Read the file\n"); /*读文件*/printf("\t\t\t 8.Display record on order\n"); /*按序号显示记录*/printf("\t\t\t 9.Sort record by writer\n"); /*按作者排序*/printf("\t\t\t 0.Exit\n"); /*退出*/printf("\n\n\t*********************************************************\n"); do{printf("\n Choice your number(0-9):");scanf("%d",&n);}while(n<0||n>9);switch(n){case 1:length=enter();menu();break;case 2:list(length);break;case 3:search(length);break;case 4:length=delete(length);menu();break;case 5:length=add(length);menu();break;case 6:save(length);break;case 7:read();break;case 8:display(length);break;case 9:sort(length);break;case 0:exit(0);}}/***********主函数**********/main(){menu();}2、各功能模块设计（1）输入模块输入到song[]中，各个元素依次输入【程序】int enter() /*输入记录*/{int i;for(i=0;i<N;i++){printf("\n please input record or direct press Q to exit");printf("\n Enter name:");scanf("%s",&s[i].name);if(s[i].name[0]=='Q'&&s[i].name[1]=='\0')break;printf(" Enter writer:");scanf("%s",&s[i].writer);printf(" Enter singer:");scanf("%s",&s[i].singer);printf(" Enter year:");scanf("%s",&s[i].year);printf("\nname writer singer year \n");printf("----------------------------------------------------\n");printf("%s, %s, %s, %s\n",s[i].name,s[i].writer,s[i].singer,s[i].year);printf("----------------------------------------------------\n");}return i;}（2）显示记录模块【程序】void list(int n) /*显示记录*/{int i;printf("\n\n\t************************LIST********************************\n\n" );printf(" \n name writer singer year \n");printf("\t----------------------------------------------------\n");for(i=0;i<n;i++)printf(" %s, %s, %s, %s\n",s[i].name,s[i].writer,s[i].sing er,s[i].year);printf("\n\n\t***************************END******************************\n"); menu();}（3）查找模块【程序】void search(int n) /*查找记录*/{int m,i;printf("\n Search by:\n");printf("\n ");printf("\n 2.writer");printf("\n 3.singer");printf("\n 0.back");do{printf("choice your number(0-3):");scanf("%d",&m);}while(m<0||m>3);switch(m){case 1:printf("please enter name to search.\n");break;case 2:printf("please enter writer to search.\n");break;case 3:printf("please enter singer to search.\n");break;case 0:menu();}i=find(n,m);if(i>n-1)printf("not found\n");else{printf("\n name writer singer year \n");printf("----------------------------------------------------\n");printf(" %s, %s, %s, %s\n",s[i].name,s[i].writer,s[i].singer,s[i] .year);printf("----------------------------------------------------\n");}menu();}int find(int n,int b){int i;switch(b){case 1:scanf("%s",);for(i=0;i<n;i++)if(strcmp(,s[i].name)==0)return i;break;case 2:scanf("%s",s3.writer);for(i=0;i<n;i++)if(strcmp(s3.writer,s[i].writer)==0)return i;break;case 3:scanf("%s",s3.singer);for(i=0;i<n;i++)if(strcmp(s3.singer,s[i].singer)==0)return i;break;}return i;}（4）删除模块int delete(int n) /*删除记录*/{char delete[25];int i,j,p,ch;printf("\n Delete by:\n");printf("\n ");printf("\n 2.writer");printf("\n 3.singer");printf("\n 0.back");do{printf("choice your number(0-3):");scanf("%d",&p);}while(p<0||p>3);switch(p){case 1:printf("please enter name to delete.\n");break;case 2:printf("please enter writer to delete.\n");break;case 3:printf("please enter singer to delete.\n");break;case 0:return 0;}i=find(n,p);if(i>n-1)printf("not found to delete \n");else{printf("\n name writer singer year \n");printf("----------------------------------------------------\n");printf("%s,%s,%s,%s\n",s[i].name,s[i].writer,s[i].singer,s[i].year);printf("----------------------------------------------------\n");printf("Are you sure to delete it?(1/0)");scanf("%d",&ch);if(ch==1){for(j=i+1;j<n;j++){strcpy(s[j-1].name,s[j].name);strcpy(s[j-1].writer,s[j].writer);strcpy(s[j-1].singer,s[j].singer);strcpy(s[j-1].year,s[j].year);}n--;}return n;（5）插入模块int add(int n) /*插入记录*/{char locate[25];int i,j;printf("\n please input record or direct press Q to exit\n");printf("\n Enter name:");scanf("%s",&);if([0]=='Q'&&[0]=='\0')return n;printf(" Enter writer:");scanf("%s",&s1.writer);printf(" Enter singer:");scanf("%s",&s1.singer);printf(" Enter year:");scanf("%s",&s1.year);printf("\nname writer singer year \n");printf("----------------------------------------------------\n");printf("%s, %s, %s, %s\n",,s1.writer,s1.singer,s1.year);printf("----------------------------------------------------\n"); printf("please input locate name\n");i=find(n,1);for(j=n-1;j>=i;j--){strcpy(s[j+1].name,s[j].name);strcpy(s[j+1].writer,s[j].writer);strcpy(s[j+1].singer,s[j].singer);strcpy(s[j+1].year,s[j].year);}strcpy(s[i].name,);strcpy(s[i].writer,s1.writer);strcpy(s[i].singer,s1.singer);strcpy(s[i].year,s1.year);n++;return n;}（6）保存到文件int save(int n) /*保存文件*/{int i;FILE*fp;if((fp=fopen("record.txt","w"))==NULL){printf("can not open file\n");return NULL;}printf("\nSaving file\n");for(i=0;i<n;i++)fprintf(fp,"%s %s %s %s\n",s[i].name,s[i].writer,s[i].singer,s[i].year); fclose(fp);printf("**********save success**********\n");menu();return 1;}（7）读取文件int read() /*读文件*/{int i;FILE*fp;if((fp=fopen("record.txt","r"))==NULL){printf("can not open file\n");return NULL;}printf("\n name writer singer year \n");printf("----------------------------------------------------\n");for(i=0;!feof(fp);i++){fscanf(fp,"%s %s %s %s\n",s[i].name,s[i].writer,s[i].singer,s[i].year);printf(" %s %s %s %s\n",s[i].name,s[i].writer,s[i].singer,s[ i].year);}printf("----------------------------------------------------\n");fclose(fp);printf("you have successed reading record from file!\n");menu();return 1;}（8）全部显示int display(int n) /*按序号显示记录*/{int a;FILE*fp;if((fp=fopen("record.txt","r"))==NULL){printf("can not open file\n");return NULL;}printf("Enter order number \n");scanf("%d",&a);if(a>=0&&a<n){fseek(fp,(a-2)*sizeof(s),1);printf("\n name writer singer year \n");printf("----------------------------------------------------\n");printf(" %s, %s, %s, %s\n",s[a-1].name,s[a-1].writer,s[a-1] .singer,s[a-1].year);printf("----------------------------------------------------\n");}elseprintf("no %d number record!\n",a);fclose(fp);menu();}void sort(int n) /*按作者排序*/{int i,j;for(i=0;i<n-1;i++)for(j=i+1;j<n;j++)if((strcmp(s[i].writer,s[j].writer))>0){s1=s[i];s[i]=s[j];s[j]=s1;}printf("\n name writer singer year \n");printf("----------------------------------------------------\n");for(i=0;i<n;i++)printf(" %s %s %s %s\n",s[i].name,s[i].writer,s[i].singe r,s[i].year);printf("----------------------------------------------------\n");printf("sort success!\n");menu();}void menu(){int n;printf("\t****************************MENU****************************\n\n"); printf("\t\t\t 1.Enter record\n"); /*输入记录*/printf("\t\t\t 2.List the file\n"); /*显示记录*/printf("\t\t\t 3.Search record\n"); /*查找记录*/printf("\t\t\t 4.Delete a record\n"); /*删除记录*/printf("\t\t\t 5.Add a record\n"); /*插入记录*/printf("\t\t\t 6.save the file\n"); /*保存文件*/printf("\t\t\t 7.Read the file\n"); /*读文件*/printf("\t\t\t 8.Display record on order\n"); /*按序号显示记录*/printf("\t\t\t 9.Sort record by writer\n"); /*按作者排序*/printf("\t\t\t 0.Exit\n"); /*退出*/printf("\n\n\t************************************************************\n"); do{printf("\n Choice your number(0-9):");scanf("%d",&n);}while(n<0||n>9);switch(n){case 1:length=enter(s);break;case 2:list(length);break;case 3:search(length);break;case 4:length=delete(length);menu();break;case 5:length=add(length);menu();break;case 6:save(length);break;case 7:read();break;case 8:display(length);break;case 9:sort(length);break;case 0:exit(0);}}运行结果输入删除保存到文件读取文件按作者排序总结通过这次C程序设计，我掌握了模块化设计方法，能够深入的理解结构化程序设计思想，熟练运用结构化程序设计方法，提高了运用C语言进行程序设计的能力。