stuManageSys/operations.c

#include "mysyslib.h"

void stucpy(Student* dest, Student* src){
  strcpy(dest->id,src->id);
  strcpy(dest->clas,src->clas);
  strcpy(dest->name,src->name);
  dest->score1 = src->score1;
  dest->score2 = src->score2;
  dest->score3 = src->score3;
  dest->score = src->score;
}

void stuswp(Student* fi, Student* se){
  Student *tmp = newStudent();
  stucpy(tmp,se);
  stucpy(se,fi);
  stucpy(fi,tmp);
}

//录入数据
void input(ss*stu){
    char tmp[5];
    do{
        int pst = stu->nums;
        printf("Id  ");
        scanf(" %s",stu->student[pst].id);
        printf("\n");
        
        printf("class  ");
        scanf(" %s",stu->student[pst].clas);
        printf("\n");
        
        printf("name  ");
        scanf(" %s",stu->student[pst].name);
        printf("\n");
        
        printf("score1  ");
        scanf("%lf",&stu->student[pst].score1);
        printf("\n");
        
        printf("score2  ");
        scanf("%lf",&stu->student[pst].score2);
        printf("\n");
        
        printf("score3  ");
        scanf("%lf",&stu->student[pst].score3);
        printf("\n");
        
        stu->student[pst].score = stu->student[pst].score1 + stu->student[pst].score2 + stu->student[pst].score3;
        stu->nums++;
        
        printf("continue?(y/n)\n");
        scanf("%s",tmp);
    }while(!strcmp(tmp,"y"));
    
    return;
}

//输出相关
void Print(Student*student){
    printf("%s,%s,%s,%.1lf,%.1lf,%.1lf,%.1lf\n",student->id,student->clas,student->name,student->score1,student->score2,student->score3,student->score);
}

void allPrint(ss*stu){
  if(stu->nums){
    for(int i = 0; i < stu->nums; ++i){
        Print(&stu->student[i]);
    }
  }else{
    printf("No data exist\n");
  }
}   

//删除学生信息
void cancel(ss*stu){
  char* tmp = (char*)malloc(sizeof(char)*3);
    do{
        char*ID = (char*)malloc(sizeof(char)*6);
        scanf("%s",ID);
        for(int i = 0; i < stu->nums; ++i){
            if(strcmp(stu->student[i].id,ID) == 0){
                for(int j = i; j < stu->nums-1; ++j){
                    stu->student[j] = stu->student[j+1];
                }
            }
        }
        stu->nums--;
        allPrint(stu);
        printf("continue?(y/n)\n");
        scanf("%s",tmp);
    }while(!strcmp(tmp,"y"));
}

//修改学生信息
void ModifyInfo(ss *stu)
{
    char tmp[5];
    do {
        int len = stu->nums;
        Student* new_stu_info = newStudent();

        printf("Id  ");
        scanf("%s", new_stu_info->id);
        printf("\n");

        printf("class  ");
        scanf(" %s", new_stu_info->clas);
        printf("\n");

        printf("name  ");
        scanf(" %s", new_stu_info->name);
        printf("\n");

        printf("score1  ");
        scanf("%lf", &new_stu_info->score1);
        printf("\n");

        printf("score2  ");
        scanf("%lf", &new_stu_info->score2);
        printf("\n");

        printf("score3  ");
        scanf("%lf", &new_stu_info->score3);
        printf("\n");

        for (int i = 0; i < len; i++) {
            if (strcmp(new_stu_info->id, stu->student[i].id) == 0) {
                stu->student[i] = new_stu_info[0];
                stu->student[i].score = stu->student[i].score1 + stu->student[i].score2 + stu->student[i].score3;
            }
        } 

        char* max = malloc(sizeof(char) * 4), * min = malloc(sizeof(char) * 4);
        strcpy(max, stu->student[0].clas);
        strcpy(min, stu->student[0].clas);

        for (int i = 0; i < len; i++) {
            if (strcmp(stu->student[i].clas , max)>0) {
                strcpy(max, stu->student[i].clas);
            }
            if (strcmp(stu->student[i].clas , min)<0) {
                strcpy(min, stu->student[i].clas);
            }
        }
        int i = 0, flag = 0;
        do {
            while (i < len && strcmp(min, stu->student[i].clas) == 0) {
                if (flag == 1) {
                    if (strcmp(stu->student[i].id, new_stu_info->id) == 0) {
                        printf("   %s %s %.1lf %.1lf %.1lf modified\n", stu->student[i].id, stu->student[i].name, stu->student[i].score1, stu->student[i].score2, stu->student[i].score3);
                    }
                    else
                        printf("   %s %s %.1lf %.1lf %.1lf\n", stu->student[i].id, stu->student[i].name, stu->student[i].score1, stu->student[i].score2, stu->student[i].score3);
                }
                else {
                    flag = 1;
                    if (strcmp(stu->student[i].id, new_stu_info->id) == 0) {
                        printf("%s %s %s %.1lf %.1lf %.1lf modified\n", stu->student[i].clas, stu->student[i].id, stu->student[i].name, stu->student[i].score1, stu->student[i].score2, stu->student[i].score3);
                    }
                    else
                        printf("%s %s %s %.1lf %.1lf %.1lf\n", stu->student[i].clas, stu->student[i].id, stu->student[i].name, stu->student[i].score1, stu->student[i].score2, stu->student[i].score3);
                }
                i++;
            }
            int class = atoi(min);
            class++;
            sprintf(min,"%d",class);
        } while (strcmp(max, min) >= 0);
        printf("continue?(y/n)\n");
        scanf("%s", tmp);
    }while (!strcmp(tmp, "y"));

    return;
}
//排序
void Order(ss *stu){
  for(int i=0;i<stu->nums;i++){
    char minclas[10];
    int minp = i;
    strcpy(minclas,stu->student[i].clas);
    for(int j=i+1;j<stu->nums;j++){
      if(strcmp(stu->student[j].clas,minclas)<0){
        strcpy(minclas,stu->student[j].clas);
        minp = j;
      }
    }
    stuswp(&stu->student[i], &stu->student[minp]);
  }
  for(int i=0;i<stu->nums;i++){
    double maxs = stu->student[i].score;
    int maxp = i;
    for(int j=i+1;j<stu->nums;j++){
      if(strcmp(stu->student[j].clas,stu->student[j-1].clas)!=0){
        break;
      }
      if(maxs<stu->student[j].score){
        maxs = stu->student[j].score;
        maxp = j;
      }
    }
    stuswp(&stu->student[i],&stu->student[maxp]);
  }
  printf("Successfully ordered!\n");
}