第8章 库与接口设计（2学时）.ppt

字符串库应用示例 完成一个简单学生电话簿管理程序，要求在一个主菜单下用户可以有以下选择 添加新记录 删除一条记录 通过姓名查询电话 浏览全部记录 退出 字符串库应用示例 #include stdio.h #include ctype.h #include string.h #define MAX 50 struct student{ char name[30]; char sex; char tel[20]; }; void Init( struct student stud[] ); void Menu( struct student stud[] ); void Add( struct student stud[] ); void Delete( struct student stud[] ); void Search( struct student stud[] ); void Browse( struct student stud[] ); int GetLength( struct student stud[] ); void main(){ struct student stud[MAX]; Init( stud ); Menu( stud ); } 字符串库应用示例 void Menu( struct student stud[] ) { int choice = 0; while( choice != 5 ){ printf(“\n1.Add\n2.Del\n3.Search\n4.Browse\n5.Exit\n“); printf(“Input your choice( 1-5 ) :“); scanf(“%d“, choice); getchar(); switch( choice ){ case 1: Add( stud ); break; case 2: Delete( stud ); break; case 3: Search( stud ); break; case 4: Browse( stud ); break; } } } 字符串库应用示例 void Init( struct student stud[] ) { int i; for( i = 0; i MAX; i++ ) strcpy( stud[i].name, ““ ); } /* 获取记录的数目 */ int GetLength( struct student stud[] ) { int length = 0; while( strcmp( stud[length].name,““ ) != 0 ) length++; return length; } 字符串库应用示例 void Add( struct student stud[] ) { int length = 0; char temp[30]; length = GetLength( stud ); do{ printf( “\nname : “ ); gets( stud[length].name ); if( strcmp( stud[length].name,““ ) == 0 ) break; printf( “\nsex: “ ); gets( temp ); stud[length].sex = temp[0]; printf( “\ntel: “ ); gets( stud[length].tel ); printf( “\nAdd next one? (Y|N): “ ); gets( temp ); } while( ( toupper( temp[0] ) == Y ) ( ++length MAX ) ); } 字符串库应用示例 void Delete( struct student stud[] ) { int length = 0, flag = 0, i; char name[30]; length = GetLength( stud ); printf( “Input the name to delete: “ ); gets( name ); for( i = 0; i length; i++ ) if( strcmp( stud[i].name, name ) == 0 ){ flag = 1; break; } if( flag ){ printf