【实验报告】输入学生信息，创立文件，实现排序，插入-白红宇

【实验报告】输入学生信息，创立文件，实现排序，插入

阅读量：5335 次

发布时间：2019-06-15

本文共 3800 字，大约阅读时间需要 12 分钟。

#include
     
      #include
      
       struct student{         char name[10];         int num;         float score_1;         float score_2;         float score_3;         float aver;}stu[6],temp; void save(){FILE*fp;int i;if((fp=fopen ("stu.dat","wb"))==NULL)               {         printf("cannot open file1\n");         return;}for(i=0;i<5;i++)if(fwrite(&stu[i],sizeof(struct student),1,fp)!=1)printf("file write error\n");fclose(fp);}void save_1(){FILE*fp;int i;if((fp=fopen ("stu_sort.dat","wb"))==NULL)               {         printf("cannot open file4\n");         return;}for(i=0;i<5;i++)if(fwrite(&stu[i],sizeof(struct student),1,fp)!=1)printf("file write error\n");fclose(fp);} void save_2(){FILE*fp;int i;if((fp=fopen ("aver.dat","wb"))==NULL)               {         printf("cannot open file7\n");         return;}for(i=0;i<5;i++)if(fwrite(&stu[i],sizeof(struct student),1,fp)!=1)printf("file write error\n");fclose(fp);}void print(){
    int i;FILE*fp;if((fp=fopen("stu.dat","rb"))==NULL){         printf("cannot open file2\n");         exit(0);}for(i=0;i<5;i++){         fread(&stu[i],sizeof(struct student),1,fp);        printf("%s\t%d\t%.2lf\t%.2lf\t%.2lf\t%.2lf\n",stu[i].name,stu[i].num,stu[i].score_1,stu[i].score_2,stu[i].score_3,stu[i].aver);}fclose(fp);} void print_1(){
    int i;FILE*fp;if((fp=fopen("stu_sort.dat","rb"))==NULL){         printf("cannot open file5\n");         exit(0);}printf("the aver is\n");for(i=0;i<5;i++){         fread(&stu[i],sizeof(struct student),1,fp);         printf("%s\t%d\t%.2lf\t%.2lf\t%.2lf\t%.2lf\n",stu[i].name,stu[i].num,stu[i].score_1,stu[i].score_2,stu[i].score_3,stu[i].aver);}fclose(fp);} void print_2(){
    int i;FILE*fp;if((fp=fopen("aver.dat","rb"))==NULL){         printf("cannot open file8\n");         exit(0);}for(i=0;i<5;i++){         fread(&stu[i],sizeof(struct student),1,fp);         printf("%s\t%d\t%.2lf\t%.2lf\t%.2lf\t%.2lf\n",stu[i].name,stu[i].num,stu[i].score_1,stu[i].score_2,stu[i].score_3,stu[i].aver);}fclose(fp);} void aver(){
    int i,j,k,l,m;FILE*fp;if((fp=fopen("stu.dat","rb"))==NULL){         printf("cannot open file3\n");         exit(0);}for(i=0;i<5;i++)fread(&stu[i],sizeof(struct student),1,fp);fclose(fp);for(j=0;j<4;j++){         k=j;         for(l=j+1;l<5;l++)                   if(stu[k].aver>stu[l].aver)k=l;                   if(k!=j)                   {                            temp=stu[j];                            stu[j]=stu[k];                            stu[k]=temp;                   }}} void insert(){int i,j,k,l;FILE*fp;if((fp=fopen("stu_sort.dat","rb"))==NULL){         printf("cannot open file6\n");         exit(0);}for(i=0;i<5;i++)fread(&stu[i],sizeof(struct student),1,fp);fclose(fp);printf("please insert data of students num,score_1,score_2,score_3,name\n");scanf("%d,%f,%f,%f,%s",&stu[5].num,&stu[5].score_1,&stu[5].score_2,&stu[5].score_3,stu[5].name);stu[5].aver=(stu[5].score_1+stu[5].score_2+stu[5].score_3)/3;for(j=0;j<4;j++){         k=j;         for(l=j+1;l<6;l++)                   if(stu[k].aver>stu[l].aver)k=l;                   if(k!=j)                   {                            temp=stu[j];                            stu[j]=stu[k];                            stu[k]=temp;                   }}}void main(){         int i;         printf("please enter data of students num,score_1,score_2,score_3,name\n");         for(i=0;i<5;i++)         {                   scanf("%d,%f,%f,%f,%s",&stu[i].num,&stu[i].score_1,&stu[i].score_2,&stu[i].score_3,stu[i].name);                   stu[i].aver=(stu[i].score_1+stu[i].score_2+stu[i].score_3)/3;         }         save();         print();         aver();         save_1();         print_1();         insert();         save_2();         print_2();}