diff --git a/main(改进版）.c b/main(改进版）.c
new file mode 100644
index 0000000..7b931c6
--- /dev/null
+++ b/main(改进版）.c
@@ -0,0 +1,70 @@
+#include<stdlib.h>
+#include<stdio.h>
+#include<conio.h>
+#include<string.h>
+#include<time.h>
+void main()
+{
+ srand(time(NULL));
+ int num=0,add=0; /* ´ðÌâÊý£¬×Ü·Ö */
+ int score[3]={10,7,5};/*µÃ¼¸·Ö*/ 
+ char str[20],str1[10][20];
+
+ while(1)
+ {
+  int a=0,b=0,d=0,c=0,k=0,i=0,j=-1,result;
+  char sf[2]={'+','-'};/* ·ûºÅ */
+  while(1)
+  {
+   a=rand()%51;/*0-50µÄËæ»úÊý*/
+   b=rand()%51;/*0-50µÄËæ»úÊý*/
+   d=rand()%2;/* Ëæ»ú·ûºÅ */
+   if(d==0)c=a+b;
+   else c=a-b;
+   if(c>=0 && c<=50)/* Èç¹ûÏàͬÖØгöÌâ */
+   {
+    sprintf(str,"%d %c %d = \n",a,sf[d],b);
+    strcpy(str1[num],str);
+    if(num==0) break;
+    j=-1;
+    for(i=0; i<num; i++)
+    {
+        if(strcmp(str,str1[i])==0)
+    {    j=1;break;}
+     }
+     if(j<0)
+      break;
+   }
+  }
+  printf("%s\n",str);/* »Ø´ð */
+  printf("ÊäÈë¼ÆËã½á¹û:\n");
+  while(1)
+  {
+   scanf("%d",&result);
+   k++;
+   if(result==c)
+   {
+    printf("»Ø´ðÕýÈ·!\n");
+    add+=score[k-1];
+    break;
+   }
+   else if(k<3)
+   {
+    printf("´íÎó,ÇëÖØлشð:\n");
+   }
+   else 
+   {    printf("´íÎó,ÕýÈ·´ð°¸: %d\n",c);
+       break;
+  }
+  } 
+   num++;
+   if(num==10)break;
+  }
+  if(add>=90)printf("\nSMART\n");
+  else if(add>=80)printf("\nGOOD\n");
+  else if(add>=70)printf("\nOK\n");
+  else if(add>=60)printf("\nPASS\n");
+  else printf("\nTRY AGAIN\n");
+getch();
+}
+
diff --git a/main（改进版）.exe b/main（改进版）.exe
new file mode 100644
index 0000000..8619293
Binary files /dev/null and b/main（改进版）.exe differ