C语音 练习10-输出学生结构体相关信息

#include <stdio.h>
#include <stdlib.h>

typedef struct student{
	int num;
	char name[20];
	float score1;
	float score2;
	float score3;
	float sum;
}stu;

void num_sort(stu **p)
{
	stu *tem;
	int i,j;
	for(j=0; j<4; j++)
	{
		for(i=0; i<4-j; i++)
		{
			if(p[i]->num > p[i+1]->num)
			{
				tem=p[i];
				p[i]=p[i+1];
				p[i+1]=tem;
			}
		}
	}
}

void print(stu **p)
{
	int i;
	for(i=0; i<5; i++)
	{
		printf("%d %s\t%5.2f %5.2f %5.2f %5.2f\n",p[i]->num,p[i]->name,
			p[i]->score1,p[i]->score2,p[i]->score3,p[i]->sum);
	}
}

void print2(stu *p)
{
	printf("%d %s\t%5.2f %5.2f %5.2f %5.2f\n",p->num,p->name,
			p->score1,p->score2,p->score3,p->sum);
}


void max1(stu **p)
{
	int tem,i,max=0;
	for(i=0; i<5; i++)
	{
		if(p[i]->score1 > max)
		{
			max=p[i]->score1;
			tem=i;
		}
	}
	print2(p[tem]);
}

void max2(stu **p)
{
	int tem,i,max=0;
	for(i=0; i<5; i++)
	{
		if(p[i]->score2 > max)
		{
			max=p[i]->score2;
			tem=i;
		}
	}
	print2(p[tem]);
}

void max3(stu **p)
{
	int tem,i,max=0;
	for(i=0; i<5; i++)
	{
		if(p[i]->score3 > max)
		{
			max=p[i]->score3;
			tem=i;
		}
	}
	print2(p[tem]);
}

void avrg(stu **p)
{
	float t1=0,t2=0,t3=0;
	int i;
	for(i=0; i<5; i++)
	{
		t1+=p[i]->score1;
		t2+=p[i]->score2;
		t3+=p[i]->score3;
	}
	printf("avrg of score1 is %5.2f\n",t1/=5);
	printf("avrg of score2 is %5.2f\n",t2/=5);
	printf("avrg of score3 is %5.2f\n",t3/=5);
}

void sum_sort(stu **p)
{
	stu *tem;
	int i,j;
	for(j=0; j<4; j++)
	{
		for(i=0; i<4-j; i++)
		{
			if(p[i]->sum > p[i+1]->sum)
			{
				tem=p[i];
				p[i]=p[i+1];
				p[i+1]=tem;
			}
		}
	}
}

int main()
{
	stu s[5];
	stu **p;
	int i;
	p=(stu**)malloc(sizeof(stu*)*5);//sizeof里面别忘了星号

	for(i=0; i<5; i++)
	{
		scanf("%d %s %f%f%f%f",&s[i].num,&s[i].name,
			&s[i].score1,&s[i].score2,&s[i].score3,&s[i].sum);
		p[i]=&s[i];
	}
	printf("before sort: \n");
	print(p);

	printf("------num_sort------\n");
	num_sort(p);
	print(p);

	printf("--------max1--------\n");
	max1(p);

	printf("--------max2--------\n");
	max2(p);

	printf("--------max3--------\n");
	max3(p);

	printf("--------avrg--------\n");
	avrg(p);

	printf("------sum_sort------\n");
	sum_sort(p);
	print(p);
	system("pause");
}