学生信息管理系统C语言版

//交流学习//QQ:1194758555#include<stdio.h>#include<string.h>#include<stdlib.h>#include<ctype.h>#include<windows.h>int k,n;struct student{double yuwen;double shuxue;double yingyu;double zong;double pingjun;char name[20];char num[20];} stu[1000];void jiazai(struct student stu[],int *num1);void baocun(struct student stu[],int n);void find(struct student stu[],int n);int findnum(struct student stu[],int n,char *num);//查找学号；void shanchu(struct student stu[],int *num1);void shanchuyi(struct student stu[],int *num1);//删除一条记录;void shanchuquanbu(struct student stu[],int *num1);void tianjiayi(struct student stu[],int i);//添加一记录；void tianjia(struct student stu[],int *num1);//添加记录；void xiugai(struct student stu[],int n);//修改一条记录；void output(struct student stu[],int n,int x);//打印信息；void paixu(struct student stu[],int n);//排序；int jianchaxuehao(struct student stu[],char *num);//检查学号的合法性；int jianchachengji(double num);//检查成绩的合法性；void outputone(struct student *stu,int i,int x);//输出一条信息void caidan();int main(){int q;jiazai(stu,&n);caidan();scanf("%d",&q);while(q>6){printf("输入错误请重新输入\n请输入0-6的数字\n");scanf("%d",&q);}Sleep(300);system("cls");switch(q){case 1 :tianjia(stu,&n);break;case 2:xiugai(stu,n);break;case 3:paixu(stu,n);break;case 4:find(stu,n);break;case 5:shanchu(stu,&n);break;case 6:output(stu,n,0);break;case 0:exit(0);}return 0;}void caidan(){printf("┌────────────────────────┐\n");printf("├───────欢迎进入学生信息管理系统─────┤\n");printf("├────────────────────────┤\n");printf("│1添加学生成绩│\n");printf("├────────────────────────┤\n");printf("│2修改学生成绩│\n");printf("├────────────────────────┤\n");printf("│3排序│\n");printf("├────────────────────────┤\n");printf("│4查找│\n");printf("├────────────────────────┤\n");printf("│5删除│\n");printf("├────────────────────────┤\n");printf("│6输出│\n");printf("├────────────────────────┤\n");printf("│0退出│\n");printf("├────────────────────────┤\n");printf("└────────────────────────┘\n");printf("请输入选择:\n");}void jiazai(struct student stu[],int *num1){FILE *fp;int i;if((fp=fopen("d:\\student.dat","r"))==NULL){*num1=0;return;}for(i=0; fread(&stu[i],sizeof(struct student),1,fp)!=0; i++)*num1=i;fclose(fp);}void paixu(struct student stu[],int n){int xuehao(const void *a,const void *b);int yuwen(const void *a,const void *b);int shuxue(const void *a,const void *b);int yingyu(const void *a,const void *b);int zongchengji(const void *a,const void *b);int (*cmp[])(const void *a,const void *b)= {xuehao,yuwen,shuxue,yingyu,zongchengji};int a;printf("┌───────────────────────┐\n");printf("│欢迎进入学生信息排序页面│\n");printf("└───────────────────────┘\n");printf("┌───────────────────────┐\n");printf("│0:按学号降序排序│\n");printf("├───────────────────────┤\n");printf("│1:按语文成绩降序排序│\n");printf("├───────────────────────┤\n");printf("│2:按数学成绩降序排序│\n");printf("├───────────────────────┤\n");printf("│3:按英语成绩降序排序│\n");printf("├───────────────────────┤\n");printf("│4:安总成绩降序排序│\n");printf("└───────────────────────┘\n");printf("请输入选择:\n");scanf("%d",&a);Sleep(300);system("cls");qsort(stu,n,sizeof(stu[0]),cmp[a]);output(stu,n,0);}int xuehao(const void *a,const void *b){if(strcmp(((struct student *)a)->num,((struct student *)b)->num)>0) return -1;elsereturn 1;}int yuwen(const void *a,const void *b){return ((struct student *)a)->yuwen < ((struct student *)b)->yuwen ? 1 : -1; }int shuxue(const void *a,const void *b){return ((struct student *)a)->shuxue < ((struct student *)b)->shuxue ? 1 : -1; }int yingyu(const void *a,const void *b){return ((struct student *)a)->yingyu < ((struct student *)b)->yingyu ? 1 : -1; }int zongchengji(const void *a,const void *b){return ((struct student *)a)->zong < ((struct student *)b)->zong ? 1 : -1;}void shanchuyi(struct student stu[],int *num1){int i,in,c;char y[20];FILE *fp;char str[20];printf("┌───────────────────────┐\n");printf("│欢迎进入学生信息删除页面│\n");printf("└───────────────────────┘\n");printf("请输入需要删除的学号\n");scanf("%s",str);c=jianchaxuehao(stu,str);while(c==0){printf("输入的学号不合法请重新输入\n");scanf("%s",str);c=jianchaxuehao(stu,str);}Sleep(300);system("cls");printf("┌───────────────────────┐\n"); printf("│欢迎进入学生信息删除页面│\n"); printf("└───────────────────────┘\n"); in=findnum(stu,*num1,str);while(in<0){printf("该学生的信息不存在\n");printf("重新输入(yes--y)返回主菜单（no--n)\n");scanf("%s",y);while(strcmp(y,"y")&&strcmp(y,"n")){printf("请输入y或n\n");scanf("%s",y);}if(!strcmp(y,"n")){Sleep(300);system("cls");main();}Sleep(300);system("cls");printf("┌───────────────────────┐\n");printf("│欢迎进入学生信息删除页面│\n");printf("└───────────────────────┘\n");printf("请输入需要删除的学号\n");scanf("%s",str);in=findnum(stu,*num1,str);}for(i=in; i<*num1-1; i++)stu[i]=stu[i+1];(*num1)--;if((fp=fopen("d:\\student.dat","w"))==NULL){printf("打开失败\n");exit(0);}Sleep(300);system("cls");printf("┌───────────────────────┐\n"); printf("│欢迎进入学生信息删除页面│\n"); printf("└───────────────────────┘\n"); printf("删除成功\n");baocun(stu,*num1);printf("继续删除（yes--y)返回上主菜单（no--n)\n");getchar();scanf("%s",y);while(strcmp(y,"y")&&strcmp(y,"n")){printf("请输入y或n\n");getchar();scanf("%s",y);}Sleep(300);system("cls");if(!strcmp(y,"n"))main();if(!strcmp(y,"y"))shanchuyi(stu,num1);}void shanchuquanbu(struct student stu[],int *num1){char y[20],a[20];FILE *fp;printf("┌───────────────────────┐\n");printf("│欢迎进入学生信息删除页面│\n");printf("└───────────────────────┘\n");printf("是否全部删除？(yes--y)返回主菜单（no--n)\n");scanf("%s",y);while(strcmp(y,"y")&&strcmp(y,"n")){printf("请输入y或n\n");scanf("%s",y);}Sleep(300);system("cls");printf("┌───────────────────────┐\n"); printf("│欢迎进入学生信息删除页面│\n"); printf("└───────────────────────┘\n"); if(!strcmp(y,"y")){fp=fopen("d:\\student.dat","w");*num1=0;printf("删除完成\n");fclose(fp);printf("返回主菜单(yes--y)结束(no--n)\n");scanf("%s",a);while(strcmp(a,"y")&&strcmp(a,"n")){printf("请输入y或n\n");scanf("%s",a);}Sleep(300);system("cls");if(!strcmp(a,"y"))main();else{Sleep(300);system("cls");return;}}else{Sleep(300);system("cls");main();}}void shanchu(struct student stu[],int *num1){int q;printf("┌─────────────────┐\n");printf("├───────删除────────┤\n");printf("├─────────────────┤\n");printf("├─────1:删除指定信息─────┤\n");printf("├─────────────────┤\n");printf("├─────2:删除全部信息─────┤\n");printf("├─────────────────┤\n");printf("└─────────────────┘\n");printf("请输入选择:\n");getchar();scanf("%d",&q);system("cls");switch(q){case 1:shanchuyi(stu,num1);break;case 2:shanchuquanbu(stu,num1);break;}}int findnum(struct student stu[],int n,char *num){int i;for(i=0; i<n; i++){if(strcmp(stu[i].num,num)==0){return i;}}return -1;}void baocun(struct student stu[],int n){FILE *fp;if((fp=fopen("d:\\student.dat","w"))==NULL) {printf("打开失败\n");exit(0);}fwrite(stu,(n+1)*sizeof(stu[0]),1,fp);fclose(fp);}void output(struct student stu[],int n,int x){int i;char y[20];if(n>0){printf("┌─────┬───┬───┬───┬───┬───┬───┐\n");printf("│%-10s│%-6s│%-6s│%-6s│%-6s│%-6s│%-6s","学号","姓名","语文","数学","英语","平均","总成绩\n");//printf("└────┘┴\n");for(i=0; i<n; i++){outputone(&stu[i],n,x);}printf("└─────┴───┴───┴───┴───┴───┴───┘\n");if(x){char q[10];printf("返回主菜单（yes-y）返回上级菜单（no-n）\n");scanf("%s",q);while(strcmp(q,"y")&&strcmp(q,"n")){printf("请输入y或n\n");scanf("%s",q);}Sleep(300);system("cls");if(!strcmp(q,"y")){main();}while(!strcmp(q,"n")){paixu(stu,n);}}}elseprintf("没有任记录，请先添加信息\n"); printf("返回主菜单（yes--y)结束（no--n)\n"); scanf("%s",y);while(strcmp(y,"y")&&strcmp(y,"n")){printf("请输入y或n\n");scanf("%s",y);}Sleep(300);system("cls");if(!strcmp(y,"y")){main();}elsereturn;}void outputone(struct student *stu,int n,int x){if(!x){printf("├─────┼───┼───┼───┼───┼───┼───┤\n");printf("│%-10s│%-6s│%-6.2lf│%-6.2lf│%-6.2lf│%-6.2lf │%-6.2lf│\n",stu->num,stu->name,stu->yuwen,stu->shuxue,stu->yingyu,stu->pingjun,st u->zong);}else{printf("┌────┬───┬───┬───┬───┬───┬───┐\n");printf("│%-8s│%-6s│%-6s│%-6s│%-6s│%-6s│%-6s","学号","姓名","语文","数学","英语","平均","总成绩\n");printf("├────┼───┼───┼───┼───┼───┼───┤\n");printf("│%-8s│%-6s│%-6.1lf│%-6.1lf│%-6.1lf│%-6.1lf│%-6.1lf │\n",stu->num,stu->name,stu->yuwen,stu->shuxue,stu->yingyu,stu->pingjun,st u->zong);printf("└────┴───┴───┴───┴───┴───┴───┘\n");}}void tianjiayi(struct student stu[],int i){int a,b;printf("请输入学生学号\n");getchar();scanf("%s",stu[i].num);a=jianchaxuehao(stu,stu[i].num);while(a==0||a==2){if(a==0)printf("输入的学号不合法请重新输入\n");if(a==2)printf("输入的学号与已有的重复请重新输入\n");scanf("%s",stu[i].num);a=jianchaxuehao(stu,stu[i].num);Sleep(300);system("cls");printf("┌───────────────────────┐\n");printf("│欢迎进入学生信息添加页面│\n");printf("└───────────────────────┘\n"); }printf("请输入该学生姓名\n");scanf("%s",stu[i].name);printf("请输入语文成绩\n");scanf("%lf",&stu[i].yuwen);b=jianchachengji(stu[i].yuwen);while(b==0){printf("输入错误请重新输入\n");scanf("%lf",&stu[i].yuwen);b=jianchachengji(stu[i].yuwen);}printf("请输入数学成绩\n");scanf("%lf",&stu[i].shuxue);b=jianchachengji(stu[i].shuxue);while(b==0){printf("输入错误请重新输入\n");scanf("%lf",&stu[i].shuxue);b=jianchachengji(stu[i].shuxue);}printf("请输入英语成绩\n");scanf("%lf",&stu[i].yingyu);b=jianchachengji(stu[i].yingyu);while(b==0){printf("输入错误请重新输入\n");scanf("%lf",&stu[i].yingyu);b=jianchachengji(stu[i].yingyu);}stu[i].pingjun=(stu[i].yuwen+stu[i].shuxue+stu[i].yingyu)/3;stu[i].zong=stu[i].yuwen+stu[i].shuxue+stu[i].yingyu;}void tianjia(struct student stu[],int *num1){char p[10]="y",y[10];printf("┌───────────────────────┐\n");printf("│欢迎进入学生信息添加页面│\n");printf("└───────────────────────┘\n");while(!strcmp(p,"y")){tianjiayi(stu,*num1);(*num1)+=1;printf("是否继续添加(yes--y,no---n)\n");getchar();scanf("%s",p);while(strcmp(p,"n")&&strcmp(p,"y")){printf("请输入y或n\n");getchar();scanf("%s",p);}Sleep(300);system("cls");}baocun(stu,*num1);printf("返回主菜单（yes--y)结束（no--n)\n");getchar();scanf("%s",y);while(strcmp(y,"n")&&strcmp(y,"y")){printf("请输入y或n\n");getchar();scanf("%s",y);}if(!strcmp(y,"y")){Sleep(300);system("cls");main();}elsereturn;}void xiugai(struct student stu[],int n){int in,b,c;char a[10],q[10];char str[20],y[10];printf("┌───────────────────────┐\n"); printf("│欢迎进入学生信息修改页面│\n"); printf("└───────────────────────┘\n"); printf("请输入要修改学生的学号\n");getchar();scanf("%s",str);c=jianchaxuehao(stu,str);in=findnum(stu,n,str);while(c==0||in<0){if(in<0||(in<0&&c==1))printf("此条信息不存在\n");if(c==0)printf("输入不合法请重新输入\n");printf("重新输入(yes--y)返回主菜单（no--n)\n");scanf("%s",a);while(strcmp(a,"y")&&strcmp(a,"n")){printf("请输入y或n\n");getchar();scanf("%s",a);}Sleep(300);system("cls");printf("┌───────────────────────┐\n");printf("│欢迎进入学生信息修改页面│\n");printf("└───────────────────────┘\n");if(!strcmp(a,"n")){Sleep(300);system("cls");main();}printf("请输入要修改学生的学号\n");scanf("%s",str);c=jianchaxuehao(stu,str);in=findnum(stu,n,str);}printf("修改前的信息如下:\n");outputone(&stu[in],n,1);printf("是否修改姓?(yes--y,no--n)\n");getchar();scanf("%s",y);while(strcmp(y,"y")&&strcmp(y,"n")){printf("请输入y或n\n");getchar();scanf("%s",y);}Sleep(300);system("cls");printf("┌───────────────────────┐\n"); printf("│欢迎进入学生信息修改页面│\n"); printf("└───────────────────────┘\n"); if(!strcmp(y,"y")){printf("请输入姓名\n");scanf("%s",stu[in].name);}printf("是否修改%s的成绩?(yes--y)返回主菜单(no--n)\n",stu[in].num); //getchar();scanf("%s",q);while(strcmp(q,"y")&&strcmp(q,"n")){printf("请输入y或n\n");getchar();scanf("%s",q);}if(!strcmp(q,"y")){printf("请输入%s的语文成绩\n",stu[in].num);scanf("%lf",&stu[in].yuwen);b=jianchachengji(stu[in].yuwen);while(b==0){printf("输入错误请重新输入\n");scanf("%lf",&stu[in].yuwen);b=jianchachengji(stu[in].yuwen);}printf("请输入%s的数学成绩\n",stu[in].num);scanf("%lf",&stu[in].shuxue);b=jianchachengji(stu[in].shuxue);while(b==0){printf("输入错误请重新输入\n");scanf("%lf",&stu[in].shuxue);b=jianchachengji(stu[in].shuxue);}printf("请输入%s的英语成绩\n",stu[in].num);scanf("%lf",&stu[in].yingyu);b=jianchachengji(stu[in].yingyu);while(b==0){printf("输入错误请重新输入\n");scanf("%lf",&stu[in].yingyu);b=jianchachengji(stu[in].yingyu);}}if(!strcmp(q,"n")){Sleep(300);system("cls");main();}baocun(stu,n);printf("添加成功\n返回主菜单（yes--y)结束（no--n)\n"); getchar();scanf("%s",y);while(strcmp(y,"y")&&strcmp(y,"n")){printf("请输入y或n\n");getchar();scanf("%s",y);}if(!strcmp(y,"y")){Sleep(300);system("cls");main();}elsereturn;}void find(struct student stu[],int n){int in,c;char str[20],y[20],q[20];printf("┌───────────────────────┐\n");printf("│欢迎进入学生信息查询页面│\n");printf("└───────────────────────┘\n");printf("请输入需要查询的学号\n");scanf("%s",str);c=jianchaxuehao(stu,str);while(c==0){printf("输入的学号不合法请重新输入\n");scanf("%s",str);c=jianchaxuehao(stu,str);}Sleep(300);system("cls");printf("┌───────────────────────┐\n"); printf("│欢迎进入学生信息查询页面│\n"); printf("└───────────────────────┘\n");in=findnum(stu,n,str);while(in<0){printf("此学号不存在请重新输入（yes--y)返回主菜单（no--n）\n");getchar();scanf("%s",q);while(strcmp(q,"y")&&strcmp(q,"n")){printf("请输入y或n\n");getchar();scanf("%s",q);}Sleep(300);system("cls");printf("┌───────────────────────┐\n");printf("│欢迎进入学生信息查询页面│\n");printf("└───────────────────────┘\n");if(!strcmp(q,"n")){Sleep(300);system("cls");main();}printf("请输入要查询的学号\n");scanf("%s",str);in=findnum(stu,n,str);}Sleep(300);system("cls");printf("┌───────────────────────┐\n"); printf("│欢迎进入学生信息查询页面│\n");printf("└───────────────────────┘\n"); if(in>=0){printf(" %s的信息如下：\n",str);outputone(&stu[in],n,1);printf("继续查询（yes--y)返回主菜单（no--n)\n");//getchar();scanf("%s",y);while(strcmp(y,"y")&&strcmp(y,"n")){printf("请输入y或n\n");//getchar();scanf("%s",y);}Sleep(300);system("cls");if(!strcmp(y,"y")){find(stu,n);}if(!strcmp(y,"n")){main();}}}int jianchaxuehao(struct student stu[],char *num) {int i,f=1,g=1;for(i=0; num[i]!='\0'; i++){if(num[i]<'0'||num[i]>'9'){f=0;break;}}for(i=0; i<n; i++){if(strcmp(stu[i].num,num)==0){g=0;break;}}if(f==1&&g==1)return 1;else if((g==0&&f==0)||(f==0&&g==1)) return 0;else if(g==0&&f==1)return 2;return 0;}int jianchachengji(double num){if(num<=100&&num>=0)return 1;elsereturn 0;}运行效果：。