Code:
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
//Defines go here:
#define FIRST 7
#define MIDDLE 1
#define LAST 9
#define STREET 16
#define CITY 12
#define STATE 2
#define ZIP 5
#define AGE 3
#define GPA 5
#define MAX 81
#define CLASS 9
//student's address info (added +1 to make room for null char)
typedef struct
{
char streetAddress[STREET + 1];
char cityName[CITY + 1];
char stateAbb[STATE + 1];
char zipCode[ZIP + 1];
} Address;
//student's personal info (added +1 to make room for null char)
typedef struct
{
char firstName[FIRST + 1];
char middleInitial[MIDDLE + 1];
char lastName[LAST + 1];
Address address;
int studentAge;
double studentGPA;
} StudFile;
//Protypes go here:
void readFile(StudFile sRec[]);
void strsub(char s1[],char s2[], int start, int length);
void printClass(StudFile sRec[]);
void highestGPA(StudFile sRec[]);
double averageGPA(StudFile sRec[]);
void aboveGPA(StudFile sRec[], double average);
void youngBelowGPA(StudFile sRec[], double average);
void sortIntArray(StudFile sRec[], int num);
//void printSort(StudFile sRec[], int num);
void main(void)
{
double average_gpa = 0;
StudFile student[CLASS];
readFile(student);
printClass(student);
highestGPA(student);
average_gpa = averageGPA(student);
aboveGPA(student,average_gpa);
youngBelowGPA(student, average_gpa);
sortIntArray(student, 9);
//printSort(student, 9);
}
void readFile(StudFile s[])
{
char line[MAX];
char tempAGE[AGE];
char tempGPA[GPA];
int i = 0;
FILE *fp;
errno_t err;
err = fopen_s(&fp, "Students.dat", "r");
if(err){
printf("File cannot be found!\n");
exit(1);
}
while(!feof(fp)){
fgets(line, MAX, fp);
strsub(line, s[i].firstName, 0, FIRST);
strsub(line, s[i].middleInitial, 8, MIDDLE);
strsub(line, s[i].lastName, 10, LAST);
strsub(line, s[i].address.streetAddress, 20, STREET);
strsub(line, s[i].address.cityName, 37, CITY);
strsub(line, s[i].address.stateAbb, 49, STATE);
strsub(line, s[i].address.zipCode, 52, ZIP);
strsub(line, tempAGE, 58, AGE - 1);
strsub(line, tempGPA, 61, GPA - 1);
s[i].studentAge = atoi(tempAGE);
s[i].studentGPA = atof(tempGPA);
i++;
}
fclose(fp);
}
void strsub(char s1[],char s2[], int start, int length)
{
int i;
for(i = start; i < (start + length); ++i){
s2[i - start] = s1[i];
}
s2[i - start] = '\0';
}
//Prints the class .dat file
void printClass(StudFile sRec[])
{
int i;
printf("Students in class:\n\n");
for(i=0;i<CLASS;++i){
printf("%s %s %s ", sRec[i].firstName, sRec[i].middleInitial, sRec[i].lastName);
printf("%s %s ", sRec[i].address.streetAddress, sRec[i].address.cityName);
printf("%s %s ", sRec[i].address.stateAbb, sRec[i].address.zipCode);
printf("%i, %.2f\n", sRec[i].studentAge, sRec[i].studentGPA);
}
printf("\n\n");
}
void highestGPA(StudFile sRec[])
{
int i, x = 0;
for(i = 0; i < CLASS; ++i){
if(sRec[i].studentGPA > sRec[x].studentGPA)
x = i;
}
printf("Student with Highest GPA: \n");
printf("%s %s %s GPA is: %.2f.\n\n", sRec[x].firstName, sRec[x].middleInitial,
sRec[x].lastName, sRec[x].studentGPA);
}
double averageGPA(StudFile sRec[])
{
int i;
double sum = 0;
for(i = 0; i < CLASS; ++i){
sum+= sRec[i].studentGPA;
}
printf("Average GPA: %.2f\n\n", sum / i);
return (sum / i);
}
void aboveGPA(StudFile sRec[],double average)
{
int i;
printf("Students with higher than average GPA:\n");
for(i = 0; i < CLASS; i++){
if(sRec[i].studentGPA >= average){
printf("%s %s %s GPA is: %.2f.\n", sRec[i].firstName, sRec[i].middleInitial,
sRec[i].lastName, sRec[i].studentGPA);
}
}
printf("\n");
}
void youngBelowGPA(StudFile sRec[], double average)
{
int i, x = 0;
printf("Youngest student with GPA below average: \n");
for(i = 0; i < CLASS; ++i){
if((sRec[i].studentGPA < average) && (sRec[i].studentAge <= sRec[x].studentAge))
x = i;
}
printf("%s %s %s GPA is: %.2f.\n\n", sRec[x].firstName, sRec[x].middleInitial,
sRec[x].lastName, sRec[x].studentGPA);
}
void sortIntArray(StudFile sRec[], int num)
{
int i, j; // indexes into unsorted and sorted partitions
int temp; // temporarily holds an element from the array
for (i = 1; i < num; ++i) {
temp = sRec[i].studentGPA;
j = i - 1;
while (j >= 0 && temp < sRec[j].studentGPA) {
sRec[j + 1].studentGPA = sRec[j].studentGPA;
j = j - 1;
}
sRec[j + 1].studentGPA = temp;
}
}
