GPA计算(链表法)

#include<stdio.h>
#include<stdlib.h>
struct course{
	double jidian;
	double credit;
	struct course*next;
};

main(){
	struct course*head,*p1,*p2,*p;
	double jidian,credit,sumofcredit=0,gpa=0;
	int size=sizeof(struct course);
	
	head=NULL;
	//录入数据
	while(1){
		printf("请输入绩点：");
		scanf("%lf",&jidian);
		printf("请输入学分：");
		scanf("%lf",&credit);
		if(!jidian || !credit)
		  break;
		p1=(struct course*)malloc(size);
		p1->jidian=jidian;
		p1->credit=credit;
		sumofcredit+=credit;
		//增加节点
		p2=head;
		head=p1;
		p1->next=p2;
	}
	//计算GPA
	p=head;
	while(p!=NULL){
		gpa+=(p->credit)/sumofcredit*(p->jidian);
		p=p->next;
	}
	printf("\nGPA is %4.2f",gpa);
	
	return 0;
	
}