Simple uses of structures

// struct.c - Simple uses of structures

#include <stdio.h>

struct student {
int  mid;
int final;
int hmws;
};

void main(void){
struct student sam = {85, 90, 88};
struct student tom = {93, 88, 91};
struct student *he = &tom;  // We can access a structure and its fields through a pointer

// We cannot read or write directly a studentas we can integers, and reals, etc. 
// Also, we cannot compare directly two students (i.e. we cannot say (sam == tom)].
// But we can assign a student to another student. For example:
tom = sam;
// Then we can output the value of tom by printing its various fields:
printf("tom = {%d, %d, %d}\n",  tom.mid, tom.final, tom.hmws); 
// Notice the dot notation for accessing the fields, of tom. 
// The output will be tom = {85, 90, 88}

printf("*he = {%d, %d, %d}\n",  he->mid, he->final, he->hmws); 
// Notice the arrow notation for accessing the fields from he. 
// The output will be *he = {85, 90, 88} 
// We would get the same output if we access the fields in a different way:
printf("*he = {%d, %d, %d}\n",  (*he).mid, (*he).final, (*he).hmws); 
}