Array of structs not updating in C project - c

Question

I am currently trying to make a Student Database system for my introductory C class. I am working on the feature of adding new students to the database so that it can be displayed. However, whenever i try to print out each individual feature of a struct in the array, it does not return what I intended. Floats become 0 and strings are not visible.
For context, here is the code used to display each element of the array
void displayStudents() {
printf("\t\tList of Student Information\n");
printf("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\n ");
printf("|No.| \t \t \t Name \t \t \t |\t Major \t\t| GPA |");
printf("\n- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\n");
int i;
for (i = 0; i < (currentEntries); i++) {
printf("%s",listOfStudents[currentEntries].name);
printf("%f",listOfStudents[currentEntries].gpa);
printf("%s",listOfStudents[currentEntries].major);
// these print statemnts above print "", 0, and "" respectively.
}
}
Here are the functions used to add new students into the array
typedef struct Student {
float gpa;
char major[100];
char name[100];
} student;
student createNewStudent(char sname[100], float gpa, char smajor[100]) {
student newstudent;
newstudent.gpa = gpa;
strcpy(newstudent.name,sname);
strcpy(newstudent.major,smajor);
return newstudent;
}
void addNewStudents() {
char name[100];
char major[100];
float gpa;
if (currentEntries > 20) {
currentEntries = 20;
printf("Database is full");
return;
}
printf("\t\t Insert Student Information \n");
printf("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - \n ");
printf("Name: \t ");
scanf("%[^\n]s",name);
printf("\nMajor\t: ");
scanf(" %[^\n]s",major);
printf("\nGPA\t:");
scanf(" %f", &gpa);
listOfStudents[currentEntries] = createNewStudent(name,gpa,major);
currentEntries++;
}
and here is how theyre called in main()
scanf("%d", &selection);
switch(selection) {
case 1:
displayStudents();
promptKeyPress(&inMenu);
break;
case 2:
addNewStudents();
promptKeyPress(&inMenu);
break;
default:
programRunning = false;
break;
also, both currentEntries and listOfStudents are defined as global variables
int currentEntries = 0;
student listOfStudents[20];
So, my question is, how should I tackle this problem so that the displayStudents function would print the correct values of my input (the student name, major and gpa)?
Any help would be appreciated. Thanks!

Answer 1

I think the problem is here:
int i;
for (i = 0; i < (currentEntries); i++) {
printf("%s",listOfStudents[currentEntries].name);
printf("%f",listOfStudents[currentEntries].gpa);
printf("%s",listOfStudents[currentEntries].major);
// these print statemnts above print "", 0, and "" respectively.
}
The index is wrong. Replace currentEntries inside the loop with i:
int i;
for (i = 0; i < (currentEntries); i++) {
printf("%s",listOfStudents[i].name);
printf("%f",listOfStudents[i].gpa);
printf("%s",listOfStudents[i].major);
// these print statemnts above print "", 0, and "" respectively.
}
As well noted in the comments section, you should also fix the following block:
if (currentEntries > 20) {
currentEntries = 20;
printf("Database is full");
return;
}
To something like:
if (currentEntries == 20) {
printf("Database is full");
return;
}