C Assignment to calculate total percentage in c by using structures

C Assignment to calculate total percentage in c by using structures

#include
#include
struct student
{
char name[20];
int age;
int RollNo;
int marks[6];
int total;
float per;
};
 void setmarks(struct student *);
 void calculate(struct student *);
 void display(struct student *);
void main()
{

 struct student s1={"xyz",23,131},*ptr;
 clrscr();
 ptr=&s1;
 printf("\n Student Name=%s",ptr->name);
 printf("\n student Age=%d",ptr->age);
 printf("\n student roll number=%d",ptr->RollNo);
 setmarks(&s1);
 calculate(&s1);
 display(&s1);
getch();
}
void setmarks(struct student * m)
{
 int i;
 printf("\n Enter marks getting in 6 subjects.........\n");
 m->total=0;
  for(i=0;i<6;i++)     
{     
scanf("%d",&m->marks[i]);
   m->total=m->total+m->marks[i];
  }
}
void calculate(struct student *  p)
{
 p->per=p->total/600.0*100;
}
void display(struct student * d)
{
 printf("\n student Name=%s",d->name);
 printf("\n student age=%d",d->age);
 printf("\n student roll no=%d",d->RollNo);
 printf("\n student total markse=%d",d->total);
 printf("\n student percentage=%f",d->per);
 }

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