diff --git a/student.txt b/student.txt
index c0f9003..0b0321a 100644
Binary files a/student.txt and b/student.txt differ
diff --git a/改进2.0.cpp b/改进2.0.cpp
new file mode 100644
index 0000000..a243532
--- /dev/null
+++ b/改进2.0.cpp
@@ -0,0 +1,303 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+struct worker//¶¨Òå½á¹¹Ìå 
+{
+long int num;
+char name[10];
+int age;
+char sex[4];
+char b[30];
+char p[15];
+};
+int n=0;
+struct worker stu[100];
+struct worker *p;
+void lr();
+void ll();
+void cx();
+void xg();
+void sc();
+void cd();
+void save();
+
+int main()
+{
+
+ int x;
+ printf("\n\t\t\t--------------------------------\n");
+ 	printf("\t\t\t  »¶Ó­Ê¹ÓÃÖ°¹¤¹ÜÀíϵͳ\n"); 
+  printf("\t\t\t  1:½øÈëÖ÷²Ëµ¥ \n");
+  printf("\t\t\t  2:Í˳ö³ÌÐò \n");
+  printf("\t\t\t  °´Êý×Ö¼üÑ¡ÔñÒªÖ´ÐеIJÙ×÷: \n");
+  printf("\t\t\t--------------------------------\n");
+  scanf("%d",&x);
+  printf("\n");
+  if(x==1)
+    cd();
+  else
+ return 0;
+}
+void cd()//Ö÷²Ëµ¥º¯Êý 
+{
+int z;
+do
+{
+printf("\n\t\t\t--------------------------------\n");
+printf("\t\t\t\t Ö÷²Ëµ¥ \n");
+printf("\t\t\t--------------------------------\n");
+printf("\t\t\t [1]----¼ÈëÖ°¹¤ÐÅÏ¢ \n");
+printf("\t\t\t [2]----ä¯ÀÀÖ°¹¤ÐÅÏ¢ \n");
+printf("\t\t\t [3]----²éѯְ¹¤ÐÅÏ¢ \n");
+printf("\t\t\t [4]----ɾ³ýÖ°¹¤ÐÅÏ¢ \n");
+printf("\t\t\t [5]----ÐÞ¸ÄÖ°¹¤ÐÅÏ¢ \n");
+printf("\t\t\t [0]----Í˳öϵͳ \n");
+printf("\t\t\t--------------------------------\n");
+printf("ÇëÊäÈëÄúµÄÑ¡Ôñ£º");
+scanf("%d", &z);
+switch(z)
+{
+case 0 : break;
+case 1 :lr();break;
+case 2 :ll();break;
+case 3 :cx();break;
+case 4 :sc();break;
+case 5 :xg();break;
+default:printf("\nÎÞЧѡÏî!");
+}
+}
+while(z!= 0);
+}
+void lr()/*¼È뺯Êý*/
+{
+int y,s;
+if(n==0)
+p=stu;
+do
+{
+printf("--------------------\n");
+printf("ÇëÊäÈëÖ°¹¤µÄÖ°¹¤ºÅ:");
+scanf("%ld",&p->num);
+printf("ÇëÊäÈëÖ°¹¤µÄÐÕÃû:");
+scanf("%s",p->name);
+printf("ÇëÊäÈëÖ°¹¤µÄÄêÁä:");
+scanf("%d",&p->age);
+printf("ÇëÊäÈëÖ°¹¤µÄÐÔ±ð:");
+scanf("%s",p->sex);
+printf("ÇëÊäÈëÖ°¹¤µÄµØÖ·:");
+scanf("%s",p->b);
+printf("ÇëÊäÈëÖ°¹¤µÄµç»°:");
+scanf("%s",p->p);
+n++;
+p++;
+printf("\n1.¼ÌÐøÊäÈë.\n0.ÊäÈëÍê±Ï.\n");
+printf("ÇëÑ¡Ôñ£º");
+scanf("%d",&y);
+}
+while(y==1);
+printf("Ìáʾ£ºÊäÈëÍê±Ï!ÄãÒ»¹²ÊäÈë%d¸ö\n",n);
+save();
+return;
+
+}
+void save() /*½¨Á¢±£´æÎļþº¯Êý*/
+{
+FILE *fp; /*¶¨ÒåÎļþÐÍÖ¸Õë*/
+int i;
+if((fp=fopen("student.txt","w+"))==NULL) /*´ò¿ªÎļþ½øÐжÁд׷¼Ó*/
+{
+printf("²»ÄÜ´ò¿ªÎļþ£¡\n");
+return; /*ÖÕÖ¹³ÌÐò*/
+}
+for(i=0;i<n;i++) /*ÏòstudentÎļþÖÐдÈëÐÅÏ¢*/
+if(fwrite(&stu[i],sizeof(struct worker),1,fp)!=1)
+printf("ÎļþдÈë´íÎó\n");
+fclose(fp); /*¹Ø±ÕÎļþ*/
+printf("\n\n\n\n\t\t\tÖ°¹¤ÐÅÏ¢±£´æ³É¹¦!\n");
+cd();
+}
+int load() /*µ¼È뺯Êý*/
+{
+FILE*fp;
+int i=0;
+if((fp=fopen("student.txt","r+"))==NULL)//´ò¿ªÎı¾½øÐжÁд 
+{
+printf ("cannot open file\n");
+exit(0);
+}
+else
+{
+do
+{
+fread(&stu[i],sizeof(struct worker),1,fp);
+i++;
+}
+while(feof(fp)==0);
+}
+fclose(fp);
+return(i-1);
+}
+void ll()/*ä¯ÀÀº¯Êý*/
+{
+int i;
+int n=load();
+if(n!=0)
+{ printf("Ö°¹¤×ÜÊý:%d\n", n);
+printf("Ö°¹¤ºÅ\tÐÕÃû\tÄêÁä\tÐÔ±ð\tµØÖ·\t\tµç»°\n");
+printf("-----------------------------------------------------\n");
+for(i=0;i<n;i++)
+printf("%ld\t%s\t%d\t%s\t%s\t\t%s\n",stu[i].num,stu[i].name,stu[i].age,stu[i].sex,stu[i].b,stu[i].p);
+}
+else printf("Ìáʾ:ÎÞÖ°¹¤Êý¾Ý£¬ÇëÊäÈëÊý¾Ý£¡");
+
+}
+void cx()/*²éѯº¯Êý*/
+{
+int c;
+int n=load();
+int w,i,j=0;
+char name[20];
+if(n!=0)
+{
+do{ printf("\n");
+printf("+--------------------+\n");
+printf("| °´Ö°¹¤ºÅ²éѯ Çë°´ 1 |\n");
+printf("| °´ÐÕÃû²éѯ Çë°´ 2 |\n");
+printf("| È¡Ïû Çë°´ 0 |\n");
+printf("+--------------------+\n");
+printf("ÇëÊäÈëÄúµÄÑ¡Ôñ£º");
+scanf("%d", &c);
+switch(c)
+{
+case 0:break;
+case 1:
+printf("ÇëÊäÈëÖ°¹¤µÄÖ°¹¤ºÅ;");
+scanf("%ld", &w);
+printf("\n");
+for(i=0;i<n;i++)
+if(stu[i].num==w)
+{
+printf("\nÖ°¹¤ºÅ\tÐÕÃû\tÄêÁä\tÐÔ±ð\tµØÖ·\t\tµç»°\n");
+printf("%ld\t%s\t%d\t%s\t%s\t\t%s\n",stu[i].num,stu[i].name,stu[i].age,stu[i].sex,stu[i].b,stu[i].p);
+j=1;
+}
+if(j==0)
+printf("Ìáʾ:ûÓиÃÖ°¹¤¼Ç¼£¬ÇëºË¶Ô£¡");
+break;
+case 2:
+printf("ÇëÊäÈëÖ°¹¤µÄÐÕÃû£º");
+scanf("%s", name);
+printf("\n");
+for(i=0;i<n;i++)
+if(strcmp(name,stu[i].name)==0)
+{
+printf("\nÖ°¹¤ºÅ\tÐÕÃû\tÄêÁä\tÐÔ±ð\tµØÖ·\t\tµç»°\n");
+j=1;
+printf("%ld\t%s\t%d\t%s\t%s\t\t%s\n",stu[i].num,stu[i].name,stu[i].age,stu[i].sex,stu[i].b,stu[i].p);
+}
+if(j==0)
+printf("Ìáʾ:ûÓиÃÖ°¹¤¼Ç¼£¬ÇëºË¶Ô£¡");
+break;
+default:
+printf("\nÌáʾ:ÎÞЧѡÏî!");
+break;
+}
+}while(c!= 0);
+}else printf("Ìáʾ:ÎÞÖ°¹¤Êý¾Ý£¬ÇëÊäÈëÊý¾Ý£¡");
+return;
+
+}
+void xg()/*Ð޸ĺ¯Êý*/
+{
+	int n=load();
+long int num;
+int i,j,c;
+if(n!=0)
+{
+printf("ÇëÊäÈëÄúÒªÐ޸ĵÄÖ°¹¤µÄÖ°¹¤ºÅ£º");
+scanf("%ld", &num);
+printf("\n");
+for(i=0;i<n;i++)
+if(stu[i].num==num)
+j=i;
+do{
+printf("ÇëÑ¡ÔñÄúÒªÐ޸ĵÄÖ°¹¤µÄÐÅÏ¢ÄÚÈÝ£º\n");
+printf("+----------------------+\n");
+printf("| ÐÕÃû Çë°´ 1 |\n");
+printf("| ÄêÁä Çë°´ 2 |\n");
+printf("| ÐÔ±ð Çë°´ 3 |\n");
+printf("| Ö°¹¤ºÅ Çë°´ 4 |\n");
+printf("| µØÖ· Çë°´ 5 |\n");
+printf("| µç»° Çë°´ 6 |\n");
+printf("| È¡Ïû Çë°´ 0 |\n");
+printf("+----------------------+\n");
+printf("ÇëÊäÈëÄúµÄÑ¡Ôñ£º");
+scanf("%d", &c);
+printf("\n");
+switch(c)
+{
+case 0:break;
+case 1:printf("ÇëÊäÈëÐÂÐÕÃû£º");
+scanf("%s",stu[j].name);
+break;
+case 2:printf("ÇëÊäÈëÐÂÄêÁ䣺");
+scanf("%d",&stu[j].age);
+break;
+case 3:printf("ÇëÊäÈëÐÂÐÔ±ð£º");
+scanf("%s",stu[j].sex);
+break;
+case 4:printf("ÇëÊäÈëÐÂÖ°¹¤ºÅ£º");
+scanf("%ld",&stu[j].num);
+break;
+case 5:printf("ÇëÊäÈëеØÖ·£º");
+scanf("%s",stu[j].b);
+break;
+case 6:printf("ÇëÊäÈëе绰£º");
+scanf("%s",stu[j].p);
+break;
+default:
+printf("\nÎÞЧѡÏî!");
+break;
+}
+}while(c!= 0);
+}else printf("Ìáʾ:ÎÞÖ°¹¤Êý¾Ý£¬ÇëÊäÈëÊý¾Ý£¡");
+save(); 
+return;
+}
+void sc()/*ɾ³ýº¯Êý*/
+{
+	
+long int num;
+int i,j,e;
+if(n!=0)
+{
+printf("Ö°¹¤ºÅ\tÐÕÃû\tÄêÁä\tÐÔ±ð\tµØÖ·\t\tµç»°\n");
+printf("-----------------------------------------------------\n");
+for(i=0;i<n;i++)
+printf("%ld\t%s\t%d\t%s\t%s\t\t%s\n",stu[i].num,stu[i].name,stu[i].age,stu[i].sex,stu[i].b,stu[i].p);
+printf("ÇëÊäÈëÄúҪɾ³ýµÄÖ°¹¤µÄÖ°¹¤ºÅ£º");
+scanf("%ld", &num);
+printf("\n");
+for(i=0;i<n;i++)
+if(num==stu[i].num)
+j=i;
+if(j!=(n-1))
+{
+for(e=i-1;e<n;e++,j++)
+{
+stu[j].num=stu[j+1].num;
+strcpy(stu[j].name,stu[j+1].name);
+strcpy(stu[j].sex,stu[j+1].sex);
+stu[j].age=stu[j+1].age;
+strcpy(stu[j].b,stu[j+1].b);
+strcpy(stu[j].p,stu[j+1].p);
+n--;p--;
+}
+}else {n--;p--;}
+printf("Ìáʾ:ɾ³ýÍê±Ï£¡");
+}else printf("Ìáʾ:ÎÞÖ°¹¤Êý¾Ý£¬ÇëÊäÈëÊý¾Ý£¡");
+save();
+return;
+}
+
diff --git a/改进2.0.exe b/改进2.0.exe
new file mode 100644
index 0000000..58d3a07
Binary files /dev/null and b/改进2.0.exe differ