Program to display the values of structure members

#include<stdio.h>
#include<string.h>
struct student
{
char name[20];
int rollno;
float marks;
};
main( )
{
struct student stu1 = {"Mary", 25, 68};
struct student stu2, stu3;
strcpy(stu2.name, "John");
stu2.rollno = 26;
stu2.marks  =  98;
printf("Enter name, rollno and marks for stu3 : ");
scanf("%s %d %f", stu3.name, &stu3.rollno, &stu3.marks);
printf("stu1 : %s  %d  %.2f\n", stu1.name, stu1.rollno, stu1.marks);
printf("stu2 : %s  %d  %.2f\n", stu2.name, stu2.rollno, stu2.marks);
printf("stu3 : %s  %d  %.2f\n", stu3.name, stu3.rollno, stu3.marks);
}