in this assignment i have to make an app to store list of students, its information :
- sId: The student ID of the form like GTxxxxx or GCxxxxx (x: is a digit)
- sName: Student name
- sDoB: Student date of birth
- sEmail: Student email
- sPhone: Student phone number
- sAddress: Student address
This application will need to provide following functionalities via a menu
=======================
1. Add new student
2. View all students
3. Search students
4. Delete students
5. Update student
6. Exit
=======================
Please choose:
When user chooses 1, program will prompt user to input student’s information (specified previously). After that, program will validate the input data and if they are all valid, program will add a new student to the current list of students. Program should inform to the user corresponding messages.
When user chooses 2, the program will list all the students to the screen, each student in a row and student’s data fields are separated by ‘|’.
When user chooses 3, the program will ask user to input student’s name to search for, the user can just type part of the name in order to search for complete student information.
When user chooses 4, program will ask user to input student id to delete the student with the specified id if it exists, otherwise, it will display a message to inform users that the student with such id doesn’t exist.
When user chooses 5, program will first ask user to input student id to update, once inserted and a student with the inserted id exists, it will display current data for each field of the student and user can type in new data to update or just press enter to keep the current data for the field.
When user chooses 6, program will exit.
So here is my code
/*
============================================================================
Name : jj.c
Author :
Version :
Copyright : Your copyright notice
Description : Hello World in C, Ansi-style
============================================================================
*/
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <malloc.h>
#include <string.h>
int i=0;
void menu(){
system("cls");
printf("=======================\n");
printf("1.Add new student\n");
printf("2.View all students\n");
printf("3.Search students\n");
printf("4.Delete students\n");
printf("5.Update student\n");
printf("6.Exit\n");
printf("=======================\n");
printf("Please select:");
int mn;
while(1){
scanf("%d",&mn);
system("cls");
if (mn ==1) addstudent();
else if(mn == 2) studentlist();
else if(mn == 3) searchstudent();
else if(mn == 4) deletestudent();
else if(mn == 5) updatestudent();
else if(mn == 6) exit(0);
menu();}
}
typedef struct student{
char sname[40];
char sid[8];
char semail[20];
char sphone[12];
char sdob[11];
char saddress[50];
}student;
student stlist[1000];
int n;
void ignoreEnter() {
char rmEnter[2];
gets(rmEnter);
}
void readgetid(){
int length;
while (1) {
gets(stlist[i].sid);
length = strlen(stlist[i].sid);
if (length !=7)
printf("The id length is wrong, please input id again:");
else {printf("id length correct\n");
} int result1,result2,result3;
result1 = strncmp(stlist[i].sid, "GC", 2);
result2 = strncmp(stlist[i].sid, "GT", 2);
int l = 2;
do {
result3 = isdigit(stlist[i].sid[l]);
l++;
if (result3 == 0)
break;
} while(l<strlen(stlist[i].sid));
if ((result1 == 0) || (result2 == 0)) {
printf("The first 2 letters are true\n");
if (result3 != 0) {
printf("id is correct\n");
break;
}
else printf("The remaining letters are wrong, please enter the id again(the remain letters must be digit): ");
} else printf("The first 2 letters are wrong, please enter id again(the letters must be GC or GT): ");
}
}
void addstudent(student *stlist) {
char count;
do {
printf("Enter information of students:\n");
printf("Enter student id:");
fflush(stdin);
readgetid();
gets(stlist[1000].sid);
printf("Enter name: ");
gets(stlist[1000].sname);
printf("Enter date of birth: ");
gets(stlist[1000].sdob);
printf("Enter email:");
gets(stlist[1000].semail);
printf("Enter phone number:");
gets(stlist[1000].sphone);
printf("Enter address:");
gets(stlist[1000].saddress);
n++;
printf("Do you want to continue input student? y/n\n");
char c; scanf("%c", &c);
ignoreEnter();
if(c == 'n')
break;
}
while(1);
}
void printstudent() {
printf("=============================\n");
printf("Student id: "); puts(stlist[1000].sid);
printf("Student name: "); puts(stlist[1000].sname);
printf("Student date of birth: "); puts(stlist[i].sdob);
printf("Student email: "); puts(stlist[1000].semail);
printf("Student phone: "); puts(stlist[1000].sphone);
printf("Student address: "); puts(stlist[1000].saddress);
printf("=============================\n");
}
void studentlist() {
int i;
for(i = 0; i < n; i++)
printstudent(1000);
getch();
}
void searchstudent() {
studentlist();
system("cls");
char search[20];
int i;
printf("Enter student name : ");
fflush(stdin);
gets(search);
printf("Students which have the name %s is: \n",search);
for(i = 0; i < n; i++)
if(strstr(stlist[1000].sname, search))
printstudent(1000);
printf("\n\n");
getch();
}
void deletestudent() {
system("cls");
printf("Student id: ");
char sid[7];
gets(sid);
int i, k;
for(i = 0; i < n; i++)
if(strcmp(sid, stlist[1000].sid) == 0) {
for(k = i + 1; k < n; k++)
stlist[k - 1] = stlist[k];
n--;
i--;
getch();
} else{
printf("The student with such id doesn’t exist");
getch();
}
}
void updatestudent() {
system("cls");
printf("Student id: ");
char sid[7];
gets(sid);
int i;
for(i = 0; i < n; i++)
if(strcmp(sid, stlist[1000].sid) == 0) {
addstudent(&stlist[1000]);
break;
}
getch();
}
int main(void){
menu();
}
the "Add new student" part when i input the data it responding the information but the output view all student part didnt save it. So the "delete student" and the "update student" part dont work. Do you guys have any changes to make it work, i will appreciate if you guys make any changes to correct my code. Thanks
