How to split string and assign them to struct - c

Question

I am trying to split a string by , and assign them to a struct.
Example string
char t1[] = "185213,Example Name,88";
And I have this struct.
typedef struct {
int studentNumber;
char studentName[200];
int grade;
} STUDENT;
STUDENT students[]= {
{...},
{...},
{...}
}
I want to split the string and push into students struct array. I mean 185213 is number, Example Name is name and 88 is grade.

Answer 1

If you know up front that your strings will always have just three fields, with the format
"%d,%s,%d", then you do not need a complex logic with loops, and input checking, and so on. Something simpler has parsing each element separately would be enough:
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
typedef struct {
int studentNumber;
char *studentName;
int grade;
} STUDENT;
int main(){
STUDENT *student = malloc(sizeof(STUDENT));
student->studentName = malloc(201); // Space for 200 characters + '\0'
char *eptr;
char t1[] = "185213,Example Name,88";
char *token = strtok(t1, ","); // Read studentNumber
student-> studentNumber = strtol(token, &eptr, 10);
token = strtok(NULL, ","); // Read the studentName
strcpy(student->studentName, token);
token = strtok(NULL, ","); // Read the grade
student-> grade = strtol(token, &eptr, 10);
printf("%d\n", student-> studentNumber);
printf("%s\n", student-> studentName);
printf("%d\n", student-> grade);
...
}
You can use the function strtok to parse the strings based on the delimiter ",", the function strcpy to copy the strings parsed from strtok into your struct, and the function strtol to parser the int value from the string read from strtok.
A difference between the STUDENT struct that I have posted and yours, is that the field char *studentName was dynamically allocated (as correctly pointed out on the comments).

Answer 2

You can do this like so (using atoi() from stdlib.h and strcpy from string.h).
char t1[] = "185213,Example Name,88";
char * pch;
STUDENT s;
pch = strtok (t1,",");
if (pch != NULL) s.studentNumber = atoi(pch);
pch = strtok (NULL,",");
if (pch != NULL) strcpy(s.studentName, pch);
pch = strtok (NULL,",");
if (pch != NULL) s.grade = atoi(pch);