delete pics to save space

2.202.cpp

@@ -0,0 +1,34 @@
+#include<cstdio>
+#include<cstring>
+const int len=3005;
+int a,b,num[len],yu[len];
+int main()
+{
+    while(scanf("%d%d",&a,&b)==2)
+    {
+        memset(num,0,sizeof(num));
+        memset(yu,0,sizeof(yu));
+        num[0]=a/b;
+        yu[0]=a%b;
+        num[1]=yu[0]*10/b;
+        yu[1]=yu[0]*10%b;
+        int n=0,m=0;
+        for(int i=2;;i++)
+        {
+            num[i]=yu[i-1]*10/b;
+            yu[i]=yu[i-1]*10%b;
+            for(int k=1;k<i;k++)
+                if(num[i]==num[k]&&yu[i]==yu[k]) {m=i;n=k;break;}
+            if(n) break;
+        }
+        printf("%d/%d = %d.",a,b,num[0]);
+        for(int i=1;i<n&&i<=50;i++)
+            printf("%d",num[i]);
+        printf("(");
+        for(int j=n;j<m&&j<=50;j++)
+            printf("%d",num[j]);
+        if(m>50) printf("...");
+        printf(")\n   %d = number of digits in repeating cycle\n\n",m-n);
+    }
+    return 0;
+}