请大佬帮弟弟改改

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int main()
{
    int i=0;
    char subject[50];
    char a[50];
    char name[50];
    struct stu {
        char name[50];
        char number[10];
        char subject[50];
        char score[3];
        char score3[3];
    };
   
        struct stu stum;   
        struct stu copy;
        
        
        FILE *fp;
        FILE *fp1;
        
        fp = NULL;
        fp1 = NULL;
        
        fp=fopen("score.txt","r+");
        fp1=fopen("score1.txt","r+");
        printf("请输入您所修改成绩学生的名字:");
        scanf("%s",&name);
        printf("请输入您所修改成绩学生的科目:");
        scanf("%s",&subject);
        while(feof(fp)==0)
        {        
            fscanf(fp,"%s %s",&stum.name,&stum.number);
            strcpy(copy.name,stum.name);
            strcpy(copy.number,stum.number);
            fprintf(fp1,"%s %s ",copy.name,copy.number);
            if(strcmp(name,stum.name)==0)
            {
                //fprintf(fp1," %s %s ",stum.name,stum.number);
                fscanf(fp," %s %s",&stum.subject,&stum.score);
                strcpy(copy.subject,subject);
                if(strcmp(subject,stum.subject)==0)
                {
                    printf("您要将该同学的%s分数改为：",copy.subject);
                    scanf("%s",&copy.score);   
                    fprintf(fp1,"%s %s ",copy.subject,copy.score);                    
                }
            }
        }
        //fseek(fp,5,2);
        //rewind(fp);
        //rewind(fp1);
        fclose(fp);
        fclose(fp1);
        fp=fopen("score.txt","w");
        fp1=fopen("score1.txt","r+");
        while(feof(fp1)==0)
        {
            fscanf(fp1,"%s %s",&stum.name,&stum.number);
            strcpy(copy.name,stum.name);
            strcpy(copy.number,stum.number);
            fprintf(fp,"%s %s ",copy.name,copy.number);
        }
        fclose(fp);
        fclose(fp1);
        return 0;
}