diff --git a/Untitled1.exe b/Untitled1.exe
index 1547bc7..2de3c66 100644
Binary files a/Untitled1.exe and b/Untitled1.exe differ
diff --git a/工作量统计.c b/工作量统计.c
new file mode 100644
index 0000000..ca44c44
--- /dev/null
+++ b/工作量统计.c
@@ -0,0 +1,243 @@
+#include "stdio.h"
+#include "stdlib.h"
+#define FILENAME "worker.bin"
+#define N 20
+/*******************************************************       
+����
+*******************************************************/
+struct worker
+{
+int number;       /*����*/
+int counts;       /*����*/
+int grade;        /*����*/
+};
+/*******************************************************       
+��ʾ�˵�
+*******************************************************/
+void xinxi()
+{
+printf("\n+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");
+printf("+                 ְ��������ͳ��ϵͳ                      +\n");
+printf("+                                                         +\n");
+printf("+                 1. ְ��������Ϣ����                     +\n");
+printf("+                                                         +\n");
+printf("+                 2. ����������                           +\n");
+printf("+                                                         +\n");
+printf("+                 3. ������������                         +\n");
+printf("+                                                         +\n");
+printf("+                 4. ��ְ�����Ž�����Ϣɾ��               +\n");
+printf("+                                                         +\n");
+printf("+                 5. ��������                             +\n");
+printf("+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");
+}
+/*******************************************************       
+��Ϣ��ʾ����Ļ
+*******************************************************/
+readFromFile(struct worker w[])
+{
+FILE *fp=NULL;
+int i=0;
+fp=fopen(FILENAME,"rb");  /*���ļ�*/
+if(fp!=NULL)
+{
+while(!feof(fp))    /*���ļ��ж���ѧ��*/{
+if(i>=N)
+break;
+if(fread(w+i,sizeof(w),1,fp)==1)
+i++;
+}
+fclose(fp);
+}
+return i;
+}
+/*******************************************************       
+����:����ְ��������Ϣ  
+*******************************************************/
+int f(struct worker w[],int length)
+{
+int i=length;
+while(i<N){
+printf("��%d��ְ��\n",i);
+printf("\n");
+printf("�������빤��(��ְ����Ϊ0����):\n");/*���빤��*/
+scanf("%d",&w[i].number);
+if(w[i].number==0)
+break;
+printf("\n");
+printf("\n");
+printf("������������:\n");/*��������*/
+scanf("%d",&w[i].counts);
+printf("\n"); 
+i++;
+}
+return i;
+}
+/*******************************************************   
+����:���������벢�ۼ� 
+*******************************************************/
+void input(struct worker w[],int length)
+{
+int i=1;
+int number,counts;
+printf("�����빤��:");
+scanf("%d",&number);  
+while(number!=0)
+{  
+printf("�������������:\n");
+scanf("%d",&counts);
+for(i=0;i<length;i++)
+if(w[i].number==number)
+{
+w[i].counts+=counts;
+break;
+}
+if(i>=length) 
+printf("���Ų�����:\n");
+printf("�����빤��:");
+scanf("%d",&number);
+}
+}
+////////////////////////////////////////////////////////////////////////////////
+/* ����������С�������򲢱������� */////////////////////////////////////////////////////////////////////////////////
+void sortCounts(struct worker w[],int length)
+{
+int i=0,j=0,k=0;
+struct worker s;
+for(i=0;i<length;i++)
+{      
+k=i;
+for(j=i+1;j<length;j++)for(j=i+1;j<length;j++)
+if(w[j].counts<w[k].counts)
+k=j;
+/*  ���� w[i] and w[k] */
+s = w[k];
+w[k] =w[i];
+w[i] = s;
+}
+if(length>0)
+w[0].grade =1;
+for(i=1;i<length;i++)
+if(w[i].counts==w[i-1].counts)
+w[i].grade=w[i-1].grade;
+else
+w[i].grade=w[i-1].grade+1;  
+}
+////////////////////////////////////////////////////////////////////////////////
+/* ������Ρ�ͬһ���ε�ְ�����������ǵĹ��ţ�����*/
+///////////////////////////////////////////////////////////////////////////////
+void sortNumber(struct worker w[],int length)
+{
+int i=0;
+int grade,count;
+if(length>0)
+{   while(i<length)
+{      
+count=0;
+grade=w[i].grade;
+printf("����:%d ", grade);
+printf(" ������:%d ",w[i].counts);
+printf("%s","����:");
+while(i<length)
+{
+if(grade==w[i].grade)
+{printf("%d ",w[i].number);
+count++;
+}
+else
+break;
+i++;
+} 
+printf("����:%d\n",count);        
+}
+}
+else
+printf("ְ�����ݲ�����!\n");
+}
+/********************************************************
+��ְ����ɾ��ְ����Ϣ
+********************************************************/
+int delet(struct worker w[],int length,int stuNum){
+int i,j;
+char choice;
+for(i=0;i<length;i++)
+{
+if(stuNum==w[i].number)
+{
+printf("��ɾ��ְ����Ϊ��");
+printf("%d\n",w[i].number);    
+break; 
+}
+}
+if(i<length)
+{
+printf("��ȷʵҪɾ�����ְ����?(Y/N)");
+scanf("%c",&choice);
+if(choice=='Y'||choice=='y')
+{
+for(j=i;j<length;j++)
+w[j]=w[j+1];
+length--;
+printf("ɾ���ɹ�!\n");
+}                
+}
+else
+printf("\nָ����ְ��������!\n");
+return length;
+}
+/********************************************************
+�ṹ�������е�ְ����Ϣ������ļ�
+********************************************************/
+void writeToFile(struct worker w[],int length){
+FILE *fp=NULL;
+int i=0;
+fp=fopen(FILENAME,"wb");
+if(fp==NULL)
+{
+printf("���ļ�������\n");
+exit(0);
+}
+for(i=0;i<length;i++)
+fwrite(w+i,sizeof(w),1,fp);
+fclose(fp);
+}
+
+int main (){   
+int choice;
+struct worker w[N];
+int NUM;
+char stuName[100];
+int stuNum;
+int length=0;
+length=readFromFile(w);//����
+do
+{    xinxi();
+scanf("%d",&choice);
+switch(choice)
+{ case 1:
+length=f(w,length);
+break;
+
+case 2:
+input(w,length);
+break;
+
+case 3:
+sortCounts(w,length);
+sortNumber(w,length);
+break;
+case 4:
+printf("��������ɾ����ְ����");
+scanf("%d",&stuNum);
+length=delet(w,length,stuNum);
+break;
+case 5:
+{    
+writeToFile(w,length);//����
+printf("����ʹ���Խ���\n");
+exit(0);      
+}
+default:
+{printf("�����������������:\n");
+}
+}}while(1);
+}