hyf_yj/Untitled2.cpp

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int i,j,k,y;
FILE *fp;
struct stu {	
	int num;
	char name[30];
	double cscore;
};
struct stu s[100];

int fun() {	// Ŀ¼<C4BF><C2BC><EFBFBD><EFBFBD>
	int n;
	system("cls");
	printf("\n\n\t\t\t\t<EFBFBD><EFBFBD>ӭʹ<EFBFBD>óɼ<EFBFBD><EFBFBD><EFBFBD>¼<EFBFBD><EFBFBD>  ");
	printf("\n\n\t\t\t");
	printf("************ <20><> <20><> *************\n");
	printf("\t\t\t[1]<5D><><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>Ϣ\n");
	printf("\t\t\t[2]<5D><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>Ϣ\n");
	printf("\t\t\t[3]<5D>޸<EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD>ɼ<EFBFBD>\n");
	printf("\t\t\t[4]<5D><>ѯѧ<D1AF><D1A7><EFBFBD><EFBFBD>Ϣ\n");
	printf("\t\t\t[5]<5D>ֶ<EFBFBD><D6B6><EFBFBD>ʾѧ<CABE><D1A7><EFBFBD>ɼ<EFBFBD>\n");
	printf("\t\t\t[6]<5D><>ѯѧ<D1AF><D1A7>ƽ<EFBFBD><C6BD><EFBFBD>ֺͼ<D6BA><CDBC><EFBFBD><EFBFBD><EFBFBD>\n");
	printf("\t\t\t[7]ѧ<><D1A7><EFBFBD>ɼ<EFBFBD><C9BC><EFBFBD><EFBFBD><EFBFBD>\n");
	printf("\t\t\t[8]<5D><>ԭ<EFBFBD>ļ<EFBFBD><C4BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>Ϣ\n");
	printf("\t\t\t[9]<5D>˳<EFBFBD><CBB3>ɼ<EFBFBD><C9BC><EFBFBD>¼<EFBFBD><C2BC>\n");
	printf("\t\t\t");
	for(i=0; i<32; i++)
		printf("-");
	printf("\n\n");
	printf("\n\t\t\t<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѡ<EFBFBD>");
	scanf("%d",&n);
	return n;
}

void input() {
	system("cls");
	i=0;
	fp=fopen("stuinfo","w");
	printf("*<2A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD>š<EFBFBD><C5A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɼ<EFBFBD><C9BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 0*\n");
	do {
		printf("<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD>ţ<EFBFBD>");
		scanf("%d",&s[i].num);
		printf("<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>");
		scanf("%s",s[i].name);
		printf("<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> C <20><><EFBFBD>Գɼ<D4B3><C9BC><EFBFBD>");
		scanf("%lf",&s[i].cscore);
		if(s[i].num!=0)
			fprintf(fp,"%d%-4s%.1lf\n",s[i].num,s[i].name,s[i].cscore);
	} while(s[i].num!=0);
	fclose(fp);
}

void output() {
	if((fp=fopen("stuinfo","r"))==NULL) {
		printf("<EFBFBD>򲻿<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>\n");
	}
	printf("\t\t\t	ȫ<><C8AB><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>Ϣ<EFBFBD><CFA2>\n");
	k=0;
	while(fscanf(fp,"%d%s%lf",&s[k].num,s[k].name,&s[k].cscore)!=EOF) {
		printf("\t\t\t%d\t%s\t%.1lf\n",s[k].num,s[k].name,s[k].cscore);
		k++;
	}
	fclose(fp);
}

void add() {
	system("cls");
	i=0;
	fp=fopen("stuinfo","a");
	printf("*<2A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD>š<EFBFBD><C5A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɼ<EFBFBD><C9BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 0*\n");
	do {
		printf("<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD>ţ<EFBFBD>");
		scanf("%d",&s[i].num);
		printf("<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>");
		scanf("%s",s[i].name);
		printf("<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> C <20><><EFBFBD>Գɼ<D4B3><C9BC><EFBFBD>");
		scanf("%lf",&s[i].cscore);
		if(s[i].num!=0)
			fprintf(fp,"%d%-4s%.1lf\n",s[i].num,s[i].name,s[i].cscore);
	} while(s[i].num!=0);
	fclose(fp);
}

void modify() {	//<2F>޸<EFBFBD>
	char st[30];
	int x,num;
	double nu;
	long h;
	k=0;
	system("cls");
	if((fp=fopen("stuinfo","r"))==NULL) {
		printf("<EFBFBD>򲻿<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>\n");
		return;
	}
	while(fscanf(fp,"%d%s%lf",&s[k].num,s[k].name,&s[k].cscore)!=EOF) {
		k++;
	}
	fclose(fp);
	printf("[1]<5D><>ѧ<EFBFBD>Ų<EFBFBD>ѯ\n[2]<5D><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѯ\n<EFBFBD><EFBFBD>ѡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>\n");
	scanf("%d",&x);
	if(x==1) {
		printf("<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD>ţ<EFBFBD>");
		scanf("%d",&num);
		for(i=0; i<k; i++)
			if(num==s[i].num) {
				printf("<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>޸ĵijɼ<EFBFBD><EFBFBD><EFBFBD>\n");
				scanf("%lf",&nu);
				s[i].cscore=nu;
				fp=fopen("stuinfo","w");
				for(i=0; i<k; i++)
					fprintf(fp,"%d%-4s%.1lf\n",s[i].num,s[i].name,s[i].cscore);
				fclose(fp);
				printf(" <20>޸ijɹ<C4B3> \n");
				return;
			}
		printf(" û<><C3BB><EFBFBD>ҵ<EFBFBD><D2B5><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>\n");
		return;
	}
	if(x==2) {
		printf("<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>");
		scanf("%s",st);
		for(i=0; i<k; i++)
			if(strcmp(s[i].name,st)==0) {
				printf(" <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>޸ĵijɼ<C4B3><C9BC><EFBFBD>\n");
				scanf("%lf",&nu);
				s[i].cscore=nu;
				fp=fopen("stuinfo","w");
				for(i=0; i<k; i++)
					fprintf(fp,"%d%-4s%.1lf\n",s[i].num,s[i].name,s[i].cscore);
				fclose(fp);
				printf(" <20>޸ijɹ<C4B3> \n");
				return;
			}
		printf(" û<><C3BB><EFBFBD>ҵ<EFBFBD><D2B5><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>\n");
		return;
	}
}

void lookat() {	//<2F><>ѯ
	char st[30];
	int x,num;
	k=0;
	system("cls");
	if((fp=fopen("stuinfo","r"))==NULL) {
		printf("<EFBFBD>򲻿<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>\n");
		return;
	}
	while(fscanf(fp,"%d%s%lf",&s[k].num,s[k].name,&s[k].cscore)!=EOF) {
		k++;
	}
	printf("[1]<5D><>ѧ<EFBFBD>Ų<EFBFBD>ѯ\n[2]<5D><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѯ\n<EFBFBD><EFBFBD>ѡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>\n");
	scanf("%d",&x);
	if(x==1) {
		printf("<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD>ţ<EFBFBD>");
		scanf("%d",&num);
		for(i=0; i<k; i++)
			if(num==s[i].num) {
				printf("%d  %s  %.1lf\n",s[i].num,s[i].name,s[i].cscore);
				return;
			}
		printf("<EFBFBD>Բ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><EFBFBD>\n");
		return;
	}
	if(x==2) {
		printf("<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>");
		scanf("%s",st);
		for(i=0; i<k; i++)
			if(strcmp(s[i].name,st)==0) {
				printf("%d  %s  %.1lf\n",s[i].num,s[i].name,s[i].cscore);
				return;
			}
		printf("<EFBFBD>Բ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><EFBFBD>\n");
	}
}

void subsection() {	//<2F>ֶ<EFBFBD>
	system("cls");
	k=0;
	if((fp=fopen("stuinfo","r"))==NULL) {
		printf("<EFBFBD>򲻿<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>\n");
	}
	while(fscanf(fp,"%d%s%lf",&s[k].num,s[k].name,&s[k].cscore)!=EOF) {
		k++;
	}
	printf("\t\t90 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ\n");
	for(i=0; i<k; i++)
		if(s[i].cscore>=90)
			printf("\t\t\t%d  %s  %.1lf\n",s[i].num,s[i].name,s[i].cscore);
	printf("\n\n");
	printf("\t\t80 <20><> 89 <20><>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ\n");
	for(i=0; i<k; i++)
		if(s[i].cscore<90&&s[i].cscore>=80)
			printf("\t\t\t%d  %s  %.1lf\n",s[i].num,s[i].name,s[i].cscore);
	printf("\n\n");
	printf("\t\t60 <20><> 79 <20><>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ\n");
	for(i=0; i<k; i++)
		if(s[i].cscore>=60&&s[i].cscore<80)
			printf("\t\t\t%d  %s  %.1lf\n",s[i].num,s[i].name,s[i].cscore);
	printf("\n\n");
	printf("\t\t60 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ\n");
	for(i=0; i<k; i++)
		if(s[i].cscore<60)
			printf("\t\t\t%d  %s  %.1lf\n",s[i].num,s[i].name,s[i].cscore);
	printf("\n\n");
}
void average() {	//ƽ<><C6BD><EFBFBD>֡<EFBFBD><D6A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 
	system("cls");
	k=0;
	double sum=0,average,jgl;
	int a=0;
	if((fp=fopen("stuinfo","r"))==NULL) {
		printf("<EFBFBD>򲻿<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>\n");
	}
	while(fscanf(fp,"%d%s%lf",&s[k].num,s[k].name,&s[k].cscore)!=EOF) {
		k++;
	}
	for(i=0; i<k; i++){
		sum+=s[i].cscore;
		}
	average=sum/k;
	printf("ƽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>%.1lf\n",average);
	for(i=0; i<k; i++)
		if(s[i].cscore>=60){
			a++;
		}
	jgl=((double)a/(double)k)*100;
	printf("<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>%.1lf%%\n",jgl);
}
	
void rank() {	//<2F><><EFBFBD><EFBFBD>
	struct stu t;
	k=0;
	system("cls");
	if((fp=fopen("stuinfo","r"))==NULL) {
		printf("<EFBFBD>򲻿<EFBFBD><EFBFBD>ļ<EFBFBD>!\n");
	}
	while(fscanf(fp,"%d%s%lf",&s[k].num,s[k].name,&s[k].cscore)!=EOF) {
		k++;
	}
	for(i=0; i<k; i++)
		for(j=i+1; j<k+1; j++)
			if(s[i].cscore<s[j].cscore) {
				t=s[i];
				s[i]=s[j];
				s[j]=t;
			}
	for(i=0; i<k; i++)
		printf("\t\t\t	<09><> %d <20><>  %d  %-4s  %.1lf\n",i+1,s[i].num,s[i].name,s[i].cscore);
}