WHEN DATA IS READ FROM FILE AND I SELECT DISPLAY ALL IT FIRSTLY DISPLAY THE INFORMATION FROM THE FILE AND FILLS WHATEVER LEFT OUT OF THE10 RECORDS WITH WEIRD SYMBOLS.
# include <stdio.h>
# include <string.h>
# include <iostream>
# include <fstream>
#include <stdlib.h>
using namespace std;
typedef struct {
char fname[20];
char lname[20];
char IDNum[20];
char DOB [20];
float GPA;
} student;
const int num_of_students=10;
int stu_num=0;
//*************************************************************
//*************************************************************
void readfromfile (student temp_array[]) {
ifstream infile ("studentfile.txt");
if (!infile){
cout << "Error ! File did not open!\n";
}
else{
for ( int q = 0 ; q < num_of_students; q++)
{
infile >> temp_array[q].fname;
infile >> temp_array[q].lname;
infile >> temp_array[q].IDNum;
infile >> temp_array[q].DOB;
infile >> temp_array[q].GPA;
}
}
infile.close();
}
//*************************************************
void writetofile(student temp_array[]) {
ofstream studentfile ("studentfile.txt", ios::app|ios::out);
if (studentfile.is_open()){
studentfile << temp_array[stu_num-1].fname << endl;
studentfile << temp_array[stu_num-1].lname << endl;
studentfile << temp_array[stu_num-1].IDNum << endl;
studentfile << temp_array[stu_num-1].DOB << endl;
studentfile << temp_array[stu_num-1].GPA << endl;
}
else cout << "Error opening file.";
}//writing to a file
//*************************************************
void addStudent(student temp_array[]) {
string tempValue;
char ok;
int total = 0 ;
int k;
int mark [4];
if (stu_num<num_of_students){
printf("\nAdd Student %d",stu_num+1,"\n");
do{//validation to check field length
printf("\nEnter First Name: ");
cin>>tempValue; //input
if(tempValue.length()>20){
ok='F';
printf("\nFirst Name Too Long!");
}else{
ok='T';
}
}while(ok!='T');
strcpy(temp_array[stu_num].fname, tempValue.c_str());
//**************
do{ //validation to check field length
printf("\nEnter Last Name: ");
cin>>tempValue;
if(tempValue.length()>20){
ok='F';
printf("\nLast Name Too Long!");
}else{
ok='T';
}
}while(ok!='T');
strcpy(temp_array[stu_num].lname, tempValue.c_str());
//**************
do{//validation to check field length
printf("\nEnter ID Number: ");
cin>>tempValue;
if(tempValue.length()>20){
ok='F';
printf("\nID Number Too Long!");
}else{
ok='T';
}
}while(ok!='T');
strcpy(temp_array[stu_num].IDNum, tempValue.c_str());
//**************
do{//validation to check field length
printf("\nEnter DOB: ");
cin>>tempValue;
if(tempValue.length()>20){
ok='F';
printf("\nDOB Number Too Long!");
}else{
ok='T';
}
}while(ok!='T');
strcpy(temp_array[stu_num].DOB, tempValue.c_str());
//**************
printf( "\nEnter 4 marks to compute a GPA. \n");
for( k = 1; k <= 4; k++){
printf("Enter mark %d : ", k);
scanf( "%d" , &mark[k]);
}
printf("\nThe marks were :\n ");
for ( k = 1; k<= 4; k++){
printf("%d : %d \n ",k,mark[k]);
total += mark[k];
}
printf("\nThe total is: %d\n" , total );
temp_array[stu_num].GPA =total / 100.00;
printf("\nThe GPA is: %.2f. " ,temp_array[stu_num].GPA);
stu_num += 1;
writetofile(temp_array);
}else {
printf("\nArray Full. No more students can be added at this time.");
}
}
//*************************************************
//*************************************************
void findStudent (student temp_array[])
{
char searchlname[20];
bool found;
int diff;
int i;
printf("\n**********FIND STUDENT**********") ;
printf("\nEnter Students Last Name:");
scanf( "%s", searchlname);
found = false;
for(i=0; i<num_of_students; i++) {
diff = strcmp(searchlname,temp_array[i].lname);
if ( diff == 0) {
found = true;
printf("\nFirts Name: %s", temp_array[i].fname);
printf("\nLast Name: %s",temp_array[i].lname);
printf("\nID Number: %s", temp_array[i].IDNum);
printf("\nDOB: %s", temp_array[i].DOB);
printf("\nGPA: %.2f.", temp_array[i].GPA);
}
}
if (found == false) {
printf("\nNo Matches Found.");
}
}//end of findStudent
//*************************************************
//*************************************************
void displayAll (student temp_array[]) {
printf("\n******DISPLAY ALL******");
printf("\n");
for ( int i = 0 ; i < num_of_students; i++){
printf("\nFirts Name: %s", temp_array[i].fname);
printf("\nLast Name: %s", temp_array[i].lname);
printf("\nID Number: %s", temp_array[i].IDNum);
printf("\nDOB: %s", temp_array[i].DOB);
printf("\nGPA: %.2f", temp_array[i].GPA);
}
}//end of displayAll
//*************************************************
//*************************************************
void bubble_sort(student temp_array[num_of_students]) {
int i, j, flag = 1;
char tempfname[20];
char templname[20];
char tempIDNum[20];
char tempDOB [20];
float tempGPA;
for(i = 1; (i <= num_of_students) && flag; i++)
{
flag = 0;
for (j=0; j < (num_of_students -1); j++)
{
if (temp_array[j+1].GPA > temp_array[j].GPA)
{
strcpy(tempfname, temp_array[j].fname);
strcpy(temp_array[j].fname, temp_array[j+1].fname);
strcpy(temp_array[j+1].fname, tempfname);
strcpy(templname, temp_array[j].lname);
strcpy(temp_array[j].lname, temp_array[j+1].lname);
strcpy(temp_array[j+1].lname, templname);
strcpy(tempIDNum, temp_array[j].IDNum);
strcpy(temp_array[j].IDNum, temp_array[j+1].IDNum);
strcpy(temp_array[j+1].IDNum, tempIDNum);
strcpy(tempDOB, temp_array[j].DOB);
strcpy(temp_array[j].DOB, temp_array[j+1].DOB);
strcpy(temp_array[j+1].DOB, tempDOB);
tempGPA = temp_array[j].GPA;
temp_array[j].GPA= temp_array[j+1].GPA;
temp_array[j+1].GPA = tempGPA;
flag = 1;
}
}
}
return;
}
//*************************************************
//*************************************************
int main (void){
student student_array[num_of_students];
char choice;
readfromfile (student_array);
printf("\n ***************DATA LOADED FROM FILE***************\n");
printf("\n");
printf("\n******MAIN MENU******");
printf("\n Choose One of the Following:");
printf("\n (1) Add Student");
printf("\n (2) Find Student");
printf("\n (3) Display All");
printf("\n (4) Sort students by marks");
printf("\n (5) Exit\n");
scanf("%c", &choice);
if (choice=='6'){
exit(0);
}
while(choice != '5') {
switch (choice) {
case '1':
addStudent (student_array);
break;
case '2':
findStudent (student_array);
break;
case '3':
displayAll (student_array);
break;
case '4':
bubble_sort (student_array);
break;
case '5':
exit (0);
break;
}
printf("\n******MAIN MENU******");
printf("\n Choose One of the Following:");
printf("\n (1) Add Student");
printf("\n (2) Find Student");
printf("\n (3) Display All");
printf("\n (4) Sort students by marks");
printf("\n (5) Exit\n");
cin >> choice;
}
return 0;
}//end of main
