学生成绩管理系统.doc

学生成绩管理系统（一）#include #include struct list int num; char name256; int china; int english; int math; struct list *next; ; typedef struct list node; typedef node *link; printf_list(link head) link pointer; pointer=head; while(pointer!=NULL) printf(number:%dn,pointer-num); printf(name:%sn,pointer-name); printf(china:%dn,pointer-china); printf(english:%dn,pointer-english); printf(math:%dn,pointer-math); pointer=pointer-next; link creat_list(link head) int cnum; char cname256; int cchina; int cenglish; int cmath; link pointer,new; int i; head=(link)malloc(sizeof(node); if(head=NULL) printf(memory allocate failure!n); exit(0); else printf(please input number:); scanf(%d,&cnum); printf(please input name:); scanf(%s,&cname); printf(please input china:); scanf(%d,&cchina); printf(please input english:); scanf(%d,&cenglish); printf(please input math:); scanf(%d,&cmath); head-num=cnum; for(i=0;inamei=cnamei; head-china=cchina; head-english=cenglish; head-math=cmath; head-next=NULL; pointer=head; while(1) new=(link)malloc(sizeof(node); if(new=NULL) printf(memory allocate failure!n); exit(0); printf(please input number:); scanf(%d,&cnum); if(cnum=0) break; printf(please input name:); scanf(%s,cname); printf(please input china:); scanf(%d,&cchina); printf(please input english:); scanf(%d,&cenglish); printf(please input math:); scanf(%d,&cmath); new-num=cnum; for(i=0;inamei=cnamei; new-china=cchina; new-english=cenglish; new-math=cmath; new-next=NULL; pointer-next=new; pointer=new; return head; search_chengji(int key1,link head) link pointer; pointer=head; while(pointer!=NULL) if(pointer-num=key1) printf(number:%dn,pointer-num); printf(name:%sn,pointer-name); printf(china:%dn,pointer-china); printf(english:%dn,pointer-english); printf(math:%dn,pointer-math); pointer=pointer-next; link modify_chengji(link head,int key3) link pointer; char xname256; int xchina; int xenglish; int xmath; int choose,i; pointer=head; printf(enter 0 exit modefiyn); printf(enter 1 modefiy namen); printf(enter 2 modefiy chinan); printf(enter 3 modefiy englishn); printf(enter 4 modefiy mathn); scanf(%d,&choose); switch(choose) case 1: printf(please input name:); scanf(%s,&xname); break; case 2: printf(please input china:); scanf(%d,&xchina); break; case 3: printf(please input english:); scanf(%d,&xenglish); break; case 4: printf(please input math:); scanf(%d,&xmath); break; while(1) pointer=pointer-next; if(pointer-num=key3) if(choose=1) for(i=0;inamei=xnamei; break; else if(choose=2) pointer-china=xchina; break; else if(choose=3) pointer-english=xenglish; break; else if(choose=4) pointer-math=xmath; break; return head; link delete_chengji(link head,int key2) link pointer; link back; pointer=head; while(1) if(head-num=key2) head=pointer-next; free(pointer); break; back=pointer; pointer=pointer-next; if(pointer-num=key2) back-next=pointer-next; free(pointer); break; return head; link insert_chengji(link head,link new,int key3) link pointer; pointer=head; while(1) if(pointer=NULL) new-next=head; head=new; break; if(pointer-num=key3) new-next=pointer-next; pointer-next=new; break; pointer=pointer-next; return head; pingjufen(link head) link pointer; int pchina,ppchina; int penglish,ppenglish; int pmath,ppmath; int count; pchina=0; penglish=0; pmath=0; count=0; pointer=head; while(1) pchina=pchina+pointer-china; penglish=penglish+pointer-english; pmath=pmath+pointer-math; count=+count; if(pointer-next=NULL) break; pointer=pointer-next; ppchina=pchina/count; ppenglish=penglish/count; ppmath=pmath/count; printf(china ping jun fen:%dn,ppchina); printf(english ping jun fen:%dn,ppenglish); printf(math ping jun fen:%dn,ppmath); main() for(;) link head; link new; int key; int keynum; printf(0exit the programm.n); printf(1create list.n); printf(2search chengji.n); printf(3modify chengji.n); printf(4delete chengji.n); printf(5add chengji.n); printf(6pingjunfeng.n); printf(7print chengji.n); scanf(%d,&key); switch(key) case 0: exit(0); case 1: head=creat_list(head); if(head!=NULL) printf_list(head); break; case 2: printf(please input 0 Exit.n); printf(please input number for search:); scanf(%d,&keynum); if(keynum=0) break; search_chengji(keynum,head); break; case 3: printf(please input number for modify:); scanf(%d,&keynum); head=modify_chengji(head,keynum); if(head!=NULL) printf_list(head); break; case 4: printf(please input 0 exitn); printf(please input number for delete:); scanf(%d,&keynum); if(keynum=0) break; head=delete_chengji(head,keynum); break; case 5: if(head!=NULL) new=(link)malloc(sizeof(node); printf(please input number:); scanf(%d,&new-num); if(new-num=0) break; printf(please input name:); scanf(%s,&new-name); printf(please input china:); scanf(%d,&new-china); printf(please input english:); scanf(%d,&new-english); printf(pleas