uva 202 Repeating Decimals

#include<iostream>#include<cstdio>#include<cstring>using namespace std;char change(int k){    return k+'0';}int main(){    int a,b;    int m,n;    while(scanf("%d%d",&a,&b)!=EOF)    {        m=a,n=b;        int y[10000];        int x=0;        int cnt=0;        string s;        if(a>b) {y[x++]=a%b;a=a%b;}        else{            while(1)            {                if(cnt)                {                    s=s+change(a/b);                    y[x++]=a%b;                }                if(a>b) break;                a=a*10;                cnt++;            }            a=a%b;        }        int count=0;        int flag=0;        while(1)        {            s=s+change((a*10)/b);            y[x]=(a*10)%b;            a=(a*10)%b;            for(int i=0;i<x-1;i++)            {                if(y[i]==y[x-1]&&x>1&&s[i]==s[x-2]&&m>n) {flag=i;count++;break;}                if(y[i]==y[x-1]&&s[i]==s[x-1]) {flag=i;count++;break;}            }            if(count) break;            x++;        }        cout<<m<<"/"<<n<<" "<<"="<<" ";        cout<<m/n<<".";        for(int i=0;i<x-1;i++)        {            if(i==50) break;            if(i==flag&&flag==x-2&&(s[i]>='0'&&s[i]<='9')) cout<<"("<<s[i]<<")";            else if(i==flag&&(s[i]>='0'&&s[i]<='9')) cout<<"("<<s[i];            else if(i==x-2&&(s[i]>='0'&&s[i]<='9'))  cout<<s[i]<<")";            else if((s[i]>='0'&&s[i]<='9')) cout<<s[i];        }        if(x>50) cout<<"...)";        cout<<endl;        cout<<"   ";        cout<<x-1-flag;        cout<<" "<<"="<<" number of digits in repeating cycle"<<endl<<endl;;    }    return 0;}