acm竞赛技巧——c/c++ /java 快读快写(整数,字符串)


注意: 本文参考博客

整数

这里用int做示范,long long,__int128 改下变量类型即可

快读

inline int rd()
{
	char ch=getchar();
	 int x=0,w=1;
	//过滤掉其他字符 
	while(ch<'0'|| ch>'9') 
	{
		if(ch=='-') w=-1;
		ch=getchar();
	}
	while(ch>='0' && ch<='9')
	{
		//代替x=x*10+ch-'0'; 
		x=(x<<1) + (x<<3) +(ch^48);
		ch=getchar();
	} 
	return x*w;
}

快写

inline void print(int x)
{
	if(x<0) 
	{
		putchar('-');
		x=-x;
	}
	if(x>9) print(x/10);
	putchar(x%10+'0');
}

字符串

读入

inline string rd()
{
	string str="";
	char ch=getchar();
	//处理空格或回车 
	while(ch==' ' || ch=='\n' || ch=='\r')
	{
		ch=getchar(); 
	}
	//读入
	while(ch!=' ' && ch!='\n' && ch!='\r')
	{
		str+=ch;
		ch=getchar();
	 } 
	return str;
}

读出

inline void print(string s)
{
	for(int i=0; s[i]!='\0'; i++) putchar(s[i]);
}

java快读快输

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.StreamTokenizer;

public class Test {
    static StreamTokenizer in = new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in)));
    static int nextInt() throws Exception{
        in.nextToken();
        return (int)in.nval;

    }
    static int n,m;
    static PrintWriter out = new PrintWriter(System.out);
    public static void main(String[] args) throws Exception {
        n = nextInt();
        out.println(n+10);
        out.flush();
    }
}

posted @ 2022-08-28 08:43  翔村亲亲鸟  阅读(160)  评论(1编辑  收藏  举报