【计算机毕业设计】C语言项目源码 c语言学生信息系统

/*#include <malloc.h>*/ #include <stdio.h> #include <stdlib.h> #include <string.h> #define LEN sizeof(struct scorenode) #define DEBUG /* 【自学去】网站收集 http://www.zixue7.com */ struct scorenode {int number;/*学号*/ char name[10];/*姓名*/ int xiaofei;/*消费情况*/ struct scorenode *next; }; typedef struct scorenode score; int n,k;/*n,k为全局变量，本程序中的函数均可*p3以使用它*/ void menu(); score *creat(void); score *load(score *head); score *search(score *head); score *del(score *head); score *add(score *head,score *stu); void print(score *head); save(score *p1); /*==============================================================================================*/ /*=========================创建链表，此函数带回一个指向链表头的指针=============================*/ score *creat(void) { score *head; score *p1,*p2,*p3,*max; int i,j; char t[10]; n=0; p1=p2=p3=(score *)malloc(LEN);/*head=p3; 开辟一个新单元*/ printf("please input student's information,input 0 exit!\n"); repeat1: printf("please input student's number(number>0):");/*输入学号，学号应大于0*/ scanf(" %d",&p1->number); while(p1->number<0) { getchar(); printf("error，please input number again:"); scanf("%d",&p1->number); } /*输入学号为字符或小于0时，程序报错，提示重新输入学号*/ if(p1->number==0) goto end;/*当输入的学号为0时，转到末尾，结束创建链表*/ else { p3=head; if(n>0) { for(i=0;i<n;i++) { if(p1->number!=p3->number) p3=p3->next; else { printf("number repeate,please input again!\n"); goto repeat1; /*当输入的学号已经存在，程序报错，返回前面重新输入*/ } } } } printf("please input student's name:"); scanf("%s",&p1->name);/*输入学生姓名*/ printf("please input student's consume money:");/*输入消费情况;*/ scanf("%d",&p1->xiaofei); while(p1->number!=0) { n=n+1; if(n==1) head=p1; else p2->next=p1; p2=p1; p1=(score *)malloc(LEN); printf("please input student's information,input 0 exit!\n"); repeat2:printf("please input student's number(number>0):"); scanf("%d",&p1->number);/*输入学号，学号应大于0*/ while(p1->number<0) {getchar(); printf("error,please input number again:"); scanf("%d",&p1->number);} /*输入学号为字符或小于0时，程序报错，提示重新输入学号*/ if(p1->number==0) goto end;/*当输入的学号为0时，转到末尾，结束创建链表*/ else { p3=head; if(n>0) {for(i=0;i<n;i++) {if(p1->number!=p3->number) p3=p3->next; else {printf("number repeate,please input again!\n"); goto repeat2; /*当输入的学号已经存在，程序报错，返回前面重新输入*/ } } } } printf("please input student's name:"); scanf("%s",&p1->name);/*输入学生姓名*/ printf("please input student's consume money:"); scanf("%d",&p1->xiaofei);/*输入消费情况; */ } end: p1=head; p3=p1; for(i=1;i<n;i++) { for(j=i+1;j<=n;j++) { max=p1; p1=p1->next; if(max->number>p1->number) { k=max->number; max->number=p1->number; p1->number=k; /*交换前后结点中的学号值，使得学号大者移到后面的结点中*/ strcpy(t,max->name); strcpy(max->name,p1->name); strcpy(p1->name,t); /*交换前后结点中的姓名，使之与学号相匹配*/ /*交换前后结点中的消费情况，使之与学号相匹配*/ } } max=head;p1=head;/*重新使max,p指向链表头*/ } p2->next=NULL;/*链表结尾*/ printf("input student's num:%d ge!\n",n); getch(); return(head); } /*==============================================================================================*/ /*===========================从文件读入学生记录=================================================*/ score *load(score *head) { score *p1,*p2; int m=0; char filepn[10]; FILE *fp; printf("please input file's postion and its name:"); scanf("%s",filepn);/*输入文件路径及名称*/ if((fp=fopen(filepn,"r+"))==NULL) { printf("can't open this file!\n"); getch(); return 0; } else { p1=(score *)malloc(LEN); /*开辟一个新单元*/ fscanf(fp,"%d%s%d\n",&p1->number,p1->name,&p1->xiaofei); printf("|%d\t|%s\t|%d\t\n",p1->number,p1->name,p1->xiaofei); /*文件读入与显示*/ head=NULL; do { n=n+1; if(n==1) head=p1; else p2->next=p1; p2=p1; p1=(score *)malloc(LEN); /*开辟一个新单元*/ fscanf(fp,"%d%s%d\n",&p1->number,p1->name,&p1->xiaofei); printf("|%d\t|%s\t|%d\t\n",p1->number,p1->name,p1->xiaofei); /*文件读入与显示*/ }while(!feof(fp)); p2->next=p1; p1->next=NULL; n=n+1; } printf("-----------------------------------------\n");/*表格下线*/ getch(); fclose(fp);/*结束读入，关闭文件*/ return (head); } /*==============================================================================================*/ /*=====================查询学生消费=====================================================*/ score *search(score *head) { int number; score *p1,*p2; printf("input the student's number of searching:"); scanf("%d",&number); getchar(); while(number!=0) { if(head==NULL) { printf("\n nobody information!\n"); return(head); } printf("-----------------------------------------\n"); printf("|number\t|name\t|consume\t \n"); printf("-----------------------------------------\n");/*打印表格域*/ p1=head; while(number!=p1->number&&p1->next!=NULL) { p2=p1; p1=p1->next; } if(number==p1->number) { printf("|%d\t|%s\t|%d\t\n",p1->number,p1->name,p1->xiaofei); printf("-----------------------------------------\n"); }/*打印表格域*/ else printf("%dthis student not exist!\n",number); printf("input the student's number of searching:"); scanf("%d",&number); getchar(); } printf("already exit!\n"); getchar(); return(head); } /*==============================================================================================*/ /*=======================删除学生资料================================================*/ score *del(score *head) { score *p1,*p2; int number; printf("input the student's number of deleting(input 0 exit):"); scanf("%d",&number); getchar(); while(number!=0)/*输入学号为0时退出*/ { if(head==NULL) { printf("\nnobody information!\n"); return(head); } p1=head; while(number!=p1->number&&p1->next!=NULL) /*p1指向的不是所要找的首结点，并且后面还有结点*/ { p2=p1; p1=p1->next; } /*p1后移一个结点*/ if(number==p1->number) /*找到了*/ { if(p1==head) head=p1->next; /*若p1指向的是首结点，把地二个结点地址赋予head*/ else p2->next=p1->next; /*否则将下一个结点地址 赋给前一结点地址*/ printf("delete number:%d\n",number); n=n-1; } else printf("%d student not exist!\n",number); /*找不到该结点*/ printf("input the student's number of deleting:"); scanf("%d",&number); getchar(); } #ifdef DEBUG printf("already exit\n"); #endif printf("now how many students:%d ge!\n",n); getch(); return(head); } /*==============================================================================================*/ /*==============================================================================================*/ score *add(score *head,score *stu) { score *p0,*p1,*p2,*p3,*max; int i,j; char t[10]; p3=stu=(score *)malloc(LEN);/*开辟一个新单元*/ printf("\ninput the student's information of adding!"); repeat4: printf("please input the student's number(number>0):"); scanf("%d",&stu->number); /*输入学号，学号应大于0*/ while(stu->number<0) { getchar(); printf("error,please input number again:"); scanf("%d"