Question

ACM问题 我的代码怎么不对？？ http://acm.swjtu.edu.cn/JudgeOnline/showproblem?problem_id=1658

http://acm.swjtu.edu.cn/JudgeOnline/showproblem?problem_id=1658
These days, Jason is learning Design Pattern.There're many patterns and some of them is very hard to understand.He focus on one pattern each day,but he may learn some patterns back and forth several times. After days of study, can you tell me how many patterns has Jason mastered?

Input

The first line is a integer m,(m<=50) standing for the number of test cases.
Each case starts with a integer n(n<=50), number of days.
Then n lines followed.
Each lines contains a string representing the pattern learned in that day.
Please note that some pattern's name may contain blank space and there are no more than 30 characters in a single name.

Output

Print the number of patterns Jason have learned.
Each line for one case.

Sample Input

2
3
SINGLETON
PROTOTYPE
PROTOTYPE
2
FACTORY METHOD
PROXY

Sample Output

2
2
我的代码：
用集合出问题了？？？
#include<iostream>
#include<set>
#include<cstdio>
#include<string>
using namespace std;
int main()
{
int t,n,i;
char a[100][100];
set<char*> st;
cin>>t;
getchar();
while(t--)
{
cin>>n;
getchar();
for(i=0;i<n;i++)
{
gets(a[i]);
st.insert(a[i]);
}
cout<<st.size()<<endl;
st.clear();
}
return 0;
}
求指教！！！！！！！！！！

Answer 1

你试一下不要把x/y,直接3*x/y,取整输出，你的程序应该是a=(double)x/(double)y;的算法有点问题吧 ，还有一点x/y==1的时候正确答案是.3000000000；
仅供参考：
#include<stdio.h>
int main()
{
int i,t,x,y;
int c[10],sign=0;
double a=0;
char ch;
scanf("%d",&t);
getchar();
while(t--)
{
scanf("%d",&x);
scanf("%c",&ch);
scanf("%d",&y);
a=(double)x/(double)y;

printf(".");
for(i=0;i<10;i++)
{
x=x*3;
c[i]=(int)(x/y);
x=x%y;
printf("%d",c[i]);
}
printf("\n");
}
return 0;
}

Answer 2

我这代码在你们OJ通过了，可能是你们OJ不支持cin和getchar()混合输入吧，毕竟两个的流不一样
#include<iostream>
#include <cstdio>
#include <set>
#include<fstream>
#include<map>
#include <string>
using namespace std;

int main()
{
int T;
scanf("%d",&T);getchar();
while(T--)
{
int n;
scanf("%d",&n);getchar();
set<string> st;
st.clear();
char str[50];
for(int i=0;i<n;i++)
{
gets(str);
st.insert(string(str));
}
printf("%d\n",st.size());
}
return 0;
}

Answer 3

ke可能是 因为你进入地方不对 吧

Answer 4

你找一些关于acm的书，自习看看把！