first commit

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; /* 答题数，总分 */
+ int score[3]={10,7,5};/*得几分*/ 
+ 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]={'+','-'};/* 符号 */
+  while(1)
+  {
+   a=rand()%51;/*0-50的随机数*/
+   b=rand()%51;/*0-50的随机数*/
+   d=rand()%2;/* 随机符号 */
+   if(d==0)c=a+b;
+   else c=a-b;
+   if(c>=0 && c<=50)/* 如果相同重新出题 */
+   {
+    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);/* 回答 */
+  printf("输入计算结果:\n");
+  while(1)
+  {
+   scanf("%d",&result);
+   k++;
+   if(result==c)
+   {
+    printf("回答正确!\n");
+    add+=score[k-1];
+    break;
+   }
+   else if(k<3)
+   {
+    printf("错误,请重新回答:\n");
+   }
+   else 
+   {    printf("错误,正确答案: %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();
+}
+