各种各样的输入输出挂 mmdns~

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原链接：点击打开链接

先上C的:

适用于正int的.

int read(){//输入优化    char ch = ' ';    while(ch < '0' || ch > '9') ch = getchar();    int x = 0;    while(ch >= '0' && ch <= '9'){        x = x * 10 + ch - '0';        ch = getchar();    }    return x;}

适用于正负int / LL / double 的. (来自风神)

template <class T>bool scan_d(T &ret){    char c;    int sgn;    T bit=0.1;    if(c=getchar(), c==EOF)        return 0;    while(c!='-' && c!='.' && (c<'0' || c>'9'))        c=getchar();    sgn=(c=='-')? -1:1;    ret=(c=='-')? 0:(c-'0');    while(c=getchar(), c>='0' && c<='9')        ret=ret*10+(c-'0');    if(c==' ' || c=='\n')    {        ret*=sgn;        return 1;    }    while(c=getchar(), c>='0' && c<='9')        ret+=(c-'0')*bit, bit/=10;    ret*=sgn;    return 1;}

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然后是 java 的.（根本不会脚哇233）

import java.util.StringTokenizer;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.math.*;import java.io.*;import java.util.*;class Scanner {    BufferedReader br;    StringTokenizer st;    public Scanner(InputStream in)     {        br = new BufferedReader(new InputStreamReader(in));        eat("");    }    private void eat(String s)     {        st = new StringTokenizer(s);    }    public String nextLine()    {        try        {            return br.readLine();        }         catch (IOException e)         {            return null;        }    }    public boolean hasNext()     {        while (!st.hasMoreTokens())        {            String s = nextLine();            if(s == null)                return false;            eat(s);        }        return true;    }    public String next()    {        hasNext();        return st.nextToken();    }    public int nextInt()    {        return Integer.parseInt(next());    }    long nextLong()    {        return Long.parseLong(next());    }    double nextDouble()     {    return Double.parseDouble(next());    }}

while(in.hasNext()) 是输入到EOF结束

输入BigInteger 要

BigInteger a=new BigInteger(in.next());

前期一直用这个

后来... 发现另一个更短的...

缓冲输入流

包含了输入输出和输出挂

import java.io.*;import java.util.*;import java.math.*;public class Main{    public static void main(String[] args) throws NumberFormatException, IOException    {         BufferedReader in = new BufferedReader(new InputStreamReader(System.in));         PrintWriter out = new PrintWriter(System.out);        out.close();    }}

仅能输入string 或单个字符

如输入 int:

　　int t=new Integer(in.readLine());

至今不会如何EOF...

所以, 综上!

import java.io.*;import java.util.*;import java.math.*;public class Main{    public static void main(String[] args)    {        InputReader in = new InputReader();        PrintWriter out = new PrintWriter(System.out);                                out.close();    }}class InputReader{    BufferedReader buf;    StringTokenizer tok;    InputReader()    {        buf = new BufferedReader(new InputStreamReader(System.in));    }    boolean hasNext()    {        while(tok == null || !tok.hasMoreElements())         {            try            {                tok = new StringTokenizer(buf.readLine());            }             catch(Exception e)             {                return false;            }        }        return true;    }    String next()    {        if(hasNext()) return tok.nextToken();        return null;    }    int nextInt()    {        return Integer.parseInt(next());    }    long nextLong()    {        return Long.parseLong(next());    }    double nextDouble()    {        return Double.parseDouble(next());    }    BigInteger nextBigInteger()    {        return new BigInteger(next());    }    BigDecimal nextBigDecimal()    {        return new BigDecimal(next());    }}

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