How to solve this error in c [Error] expected primary-expression before '.' token please check my code

Question

#include <stdio.h>
#include <string.h>
#define size 100

typedef struct StudentData{

char name[size];
char surname[size];
int std_ID;
char nationality[size];
char department[size];
int year;
float CGPA;
char gender;

}s1, s2;

int main ()
{
strcpy(s1.name, "Albert");
strcpy(s1.surname, "Paul");
s1.std_ID = 12345678;
strcpy(s1.department, "Software Engineering");
s1.year = 1;
s1.CGPA = 1.91;
s1.gender = 'M';

printf("S1 full name is %c %c \n", s1.name, s1.surname);
printf("His std_ID is %c and gender is %c \n", s1.std_ID, s1.gender);
printf("his dep. is %c \n", s1.department);
printf("His CGPA is %f, and year is %d \n", s1.CGPA, s1.year);

return 0;
}

Answer 1

The syntax of the typedef is wrong. try:

...
typedef struct {
...
//attributes
...
} <struct_name_here>;

i changed yours to define a type called student, then made two student variables: s1 & s2
EDIT: then deleted the second variable because it was unused

Also, look at your string formatting. You are looking for %c 'characters' but passing %s 'strings'

https://code.sololearn.com/cu5kZ6gQdpJ0/?ref=app