1 #include<iostream>
2 #include<vector>
3 #include<stdio.h>
4 #include<cstring>
5 #include<fstream>
6 #include<algorithm>
7 using namespace std;
8 class student
9 {
10 public:
11 long int reg;
12 char name[80],branch[50];
13 void input()
14 {
15 cout<<"\n Enter name: ";
16 gets(name);
17 cout<<"\n Enter roll no: ";
18 cin>>reg;
19 fflush(stdin);
20 cout<<"\n Enter Branch: ";
21 gets(branch);
22 }
23 void display()
24 {
25 system("CLS");
26 cout<<"\t\tDisplay Records";
27 cout<<"\n";
28 cout<<"\n Name - "<<name;
29 cout<<"\n Reg no. - "<<reg;
30 cout<<"\n Branch - "<<branch;
31 cout<<"\n";
32 system("PAUSE");
33 system("CLS");
34 }
35 bool operator == (student a)
36 {
37 if(reg==a.reg)
38 return true;
39 else
40 return false;
41 }
42 };
43 vector <student>v;
44 int search_reg(long int reg,int &i);
45 void get_file()
46 {
47 student x;
48 int i=0;
49 fstream f;
50 f.open("College.txt",ios::in);
51 if(f)
52 {
53 f.read((char *) &x,sizeof(class student));
54 while(!f.eof())
55 {
56 v.push_back(x);
57 f.read((char *) &x,sizeof(class student));
58 }
59 }
60 else
61 ;
62 f.close();
63 }
64 void bubblesort()
65 {
66 int i,j;
67 student x;
68 for(i=0;i<v.size();i++)
69 for(j=0;j<v.size()-i-1;j++)
70 if(v[j].reg>v[j+1].reg)
71 {
72 x=v[j];
73 v[j]=v[j+1];
74 v[j+1]=x;
75 }
76 }
77 void insert_new()
78 {
79 char ch='y';
80 int ta;
81 while(ch=='y')
82 {
83 fflush(stdin);
84 student x;
85 x.input();
86 if(search_reg(x.reg,ta)==0)
87 v.push_back(x);
88 else
89 cout<<"\nTHE REGISTRATION NO. ALREADY EXIST!!!\nCANNOT ADD";
90 cout<<"\n Press [Y] to enter more: ";
91 cin>>ch;
92 fflush(stdin);
93 }
94 }
95 void write_file()
96 {
97 bubblesort();
98 fstream f;
99 f.open("College.txt",ios::out);
100 for(int i=0;i<v.size();i++)
101 {
102 student x=v[i];
103 f.write((char *) &x,sizeof(class student));
104 }
105 f.close();
106 }
107 int search_reg(long int reg,int &i)
108 {
109 int ta=0;
110 for(i=0;i<v.size();i++)
111 if(v[i].reg==reg)
112 {
113 ta=1;
114 break;
115 }
116 return ta;
117 }
118 int search_name(char name[],vector<int> &vi)
119 {
120 int i,ta=0;
121 for(i=0;i<v.size();i++)
122 if(strcmp(v[i].name,name)==0)
123 {
124 ta=1;
125 vi.push_back(i);
126 }
127 return ta;
128 }
129 int search_branch(char branch[],vector<int> &vj)
130 {
131 int i,ta=0;
132 for(i=0;i<v.size();i++)
133 if(strcmp(v[i].branch,branch)==0)
134 {
135 ta=1;
136 vj.push_back(i);
137 }
138 return ta;
139 }
140 void search_and_show()
141 {
142 int ch,i,ta=0;
143 char name[80],branch[50];
144 vector <int>vi;
145 vector <int>vj;
146 long int reg;
147 poi:
148 cout<<"\n1.Press to search reg no."
149 <<"\n2.Press to search name"
150 <<"\n3.Press to search branch";
151 cin>>ch;
152 switch(ch)
153 {
154 case 1:
155 cout<<"\nEnter reg no.: ";
156 cin>>reg;
157 if(search_reg(reg,i)==1)
158 v[i].display();
159 else
160 cout<<"\nRecord NOT FOUND!!!";
161 break;
162 case 2:
163 cout<<"\nEnter name: ";
164 fflush(stdin);
165 gets(name);
166 if(search_name(name,vi)==1)
167 {
168 for(int j=0;j<vi.size();j++)
169 v[vi[j]].display();
170 }
171 else
172 cout<<"\nRecord NOT FOUND!!!";
173 break;
174 case 3:
175 cout<<"\nEnter branch: ";
176 fflush(stdin);
177 gets(branch);
178 if(search_branch(branch,vj)==1)
179 {
180 for(int j=0;j<vj.size();j++)
181 v[vj[j]].display();
182 }
183 else
184 cout<<"\nRecord NOT FOUND!!!";
185 break;
186 default:
187 cout<<"\nWrong CHOICE!!!";
188 goto poi;
189 }
190 }
191 void show()
192 {
193 int i;
194 for(i=0;i<v.size();i++)
195 v[i].display();
196 }
197 void delete_data()
198 {
199 int i,j;
200 long int reg;
201 vector <student>::iterator p=v.begin();
202 cout<<"\nEnter Reg. no.: ";
203 cin>>reg;
204 if(search_reg(reg,i)==1)
205 {
206 student x=v[i];
207 cout<<"\nThe following data is being deleted";
208 x.display();
209 p+=i;
210 v.erase(p,p+1);
211 }
212 }
213 void edit_data()
214 {
215 int i,j;
216 long int reg;
217 vector <student>vi;
218 cout<<"\nEnter Reg. no.: ";
219 cin>>reg;
220 if(search_reg(reg,i)==1)
221 {
222 cout<<"\nEnter new data:";
223 fflush(stdin);
224 v[i].input();
225 }
226 }
227 int main()
228 {
229 int i=1;
230 get_file();
231 while(i)
232 {
233 system("CLS");
234 cout<<"\t\t\t-----------------------------------------\n";
235 cout<<"\t\t\t Simple College Management System\n";
236 cout<<"\t\t\t-----------------------------------------\n";
237 cout<<"\n\t\t\tEnter <1> to Add new student"
238 <<"\n\t\t\tEnter <2> to Display all student"
239 <<"\n\t\t\tEnter <3> to Remove student"
240 <<"\n\t\t\tEnter <4> to Edit student"
241 <<"\n\t\t\tEnter <5> to Search student"
242 <<"\n\t\t\tEnter <0> to Exit\n";
243 cout<<"\n\n\t\t\tEnter Your Choice:";
244 cin>>i;
245 switch(i)
246 {
247 case 1 :
248 insert_new();
249 break;
250 case 2 :
251 show();
252 break;
253 case 3 :
254 delete_data();
255 break;
256 case 4 :
257 edit_data();
258 break;
259 case 5 :
260 search_and_show();
261 break;
262 case 0 :
263 write_file();
264 break;
265 default :
266 cout<<"\nWRONG CHOICE!!!\nTRY AGAIN";
267 }
268 }
269 return 0;
270 }
