tongxunlu.zip_visual c

#include<iostream.h> #include<fstream.h> #include<iomanip.h> static int n=0; int comp(char*,char*); class MyFriend { unsigned int age; char name[12]; char TelNo[12]; public: void getdata() { cout<<"(年龄 姓名 电话):"; cin>>age>>name>>TelNo; } void disp() { cout<<setiosflags(ios::left) <<setw(6)<<age<<setw(10)<<name<<setw(7)<<TelNo<<endl; } char *getname() { return name; } }; void func1() { ofstream output("MyFrd.dat"); MyFriend s; cout<<"输入数据"<<endl; cout<<"联系人个数:"; cin>>n; for(int i=0;i<n;i++) { cout<<"第"<<i+1<<"个联系人"; s.getdata(); output.write((char *)&s,sizeof(s)); }; output.close(); } void func2() { ifstream input("MyFrd.dat"); MyFriend s; cout<<"输入信息"<<endl; cout<<setiosflags(ios::left) <<setw(6)<<"年龄"<<setw(10)<<"姓名"<<setw(7)<<"电话"<<endl; input.read((char *)&s,sizeof(s)); while(input) { s.disp(); input.read((char*)&s,sizeof(s)); }; input.close(); } void func3() { char sname[10]; fstream file("MyFrd.dat",ios::in); MyFriend one; file.seekg(0); cout<<"输入要查询的姓名（可只输入姓氏）:"; cin>>sname; cout<<"输出查询结果:"<<endl; cout<<setw(6)<<"年龄"<<setw(10)<<"姓名"<<setw(6)<<"电话"<<endl; for(int i=0;i<n;i++) { file.read((char *)&one,sizeof(MyFriend)); if(comp(one.getname(),sname)==1) one.disp(); } file.close(); } int comp(char s1[],char s2[]) { int i=0; while(s1[i]!='\0' && s2[i]!='\0' && s1[i]==s2[i]) i++; if(s1[i]=='\0' || s2[i]=='\0') return 1; else return 0; } void main() { int sel; do { cout<<"选择（1:输入信息 2：输出所有信息 3:按姓名查询 4:退出）："; cin>>sel; switch(sel) { case 1:func1();break; case 2:func2();break; case 3:func3();break; } }while(sel==1||sel==2||sel==3); }