c语言程序设计学生学籍管理，数据库，SQL

#include <stdio.h> #include <stdlib.h> struct student { int xh; char xm[9]; int cj; char dj[10]; } stu[30]; int highlow(struct student st[],int num) { int i,imax,imin; imax=0;imin=0; for (i=0;i<num;i++){ if(st[i].cj>st[imax].cj) imax=i; if(st[i].cj<st[imin].cj) imin=i; } printf("High score student is:\n"); printf("%d %s %d %s\n",st[imax].xh,st[imax].xm,st[imax].cj,st[imax].dj); printf("Low score student is:\n"); printf("%d %s %d %s\n",st[imin].xh,st[imin].xm,st[imin].cj,st[imin].dj); return(0); } int printst(struct student st[],int num) { int i; printf("Table of students' scores\n"); for (i=0;i<num;i++){ printf("%d %s %d %s\n",st[i].xh,st[i].xm,st[i].cj,st[i].dj); }; return(0); } main() { int i,fu,num=0; for(i=0;i<30;i++) stu[i].xh=0; printf("input xh <=0 to break the input\n"); for(i=0;i<30;i++){ scanf("%d %s %d",&stu[i].xh,stu[i].xm,&stu[i].cj); if (stu[i].xh<=0) break; num++; if (stu[i].cj>=85) strcpy(stu[i].dj,"Very Good"); if (stu[i].cj>=60&&stu[i].cj<80) strcpy(stu[i].dj,"Pass"); if (stu[i].cj<60) strcpy(stu[i].dj,"No Pass"); } for(;;){ printf("Please select function:0--exit;1--student of High and low score;\n"); printf(" 2--table of student.\n"); fu=0; scanf("%d",&fu); if (fu==0) exit(0); if (fu==1) highlow(stu,num); if (fu==2) printst(stu,num); else { printf("Please right select.\n"); continue; } } }