「题目代码」P1039～P1043（Java）

P1039 谭浩强C语言(第三版)习题4.9

import java.util.*;
import java.io.*;
import java.math.BigInteger;

public class Main
{
    public static void main(String args[])
    {
        Scanner cin=new Scanner(System.in);
        double f=cin.nextDouble();

        System.out.printf("c=%.2f\n",5*(f-32)/9);
    }
}

P1040 谭浩强C语言(第三版)习题5.4

import java.util.*;
import java.io.*;
import java.math.BigInteger;

public class Main
{
    public static void main(String args[])
    {
        Scanner cin=new Scanner(System.in);
        int a=cin.nextInt(),b=cin.nextInt(),c=cin.nextInt();
        if(a<b) a=b;
        if(a<c) a=c;
        System.out.println(a);
    }
}

P1041 谭浩强C语言(第三版)习题5.5

import java.util.*;
import java.io.*;
import java.math.BigInteger;

public class Main
{
    public static void main(String args[])
    {
        Scanner cin=new Scanner(System.in);
        int x=cin.nextInt();
        if(x>=1)
        {
            if(x<10) x=x*2-1;
            else x=3*x-11;
        }
        System.out.println(x);
    }
}

P1042 谭浩强C语言(第三版)习题5.6

import java.util.*;

import javax.lang.model.util.ElementScanner6;

import java.io.*;
import java.math.BigInteger;

public class Main
{
    public static void main(String args[])
    {
        Scanner cin=new Scanner(System.in);
        int x=cin.nextInt();
        if(x>=90)
            System.out.println("A");
        else if(x>=80)
            System.out.println("B");
        else if(x>=70)
            System.out.println("C");
        else if(x>=60)
            System.out.println("D");
        else
            System.out.println("E");
    }
}

P1043 谭浩强C语言(第三版)习题5.7

import java.util.*;
import java.io.*;
import java.math.BigInteger;

public class Main
{
    public static void main(String args[])
    {
        Scanner cin=new Scanner(System.in);
        int x=cin.nextInt(),cnt=0;
		int[] arr=new int[10];
		do
		{
			arr[cnt++]=x%10;
			x/=10;
		}
		while(x!=0);
		System.out.println(cnt);
		for(int i=cnt-1;i>=0;--i)
		{
			if(i==0)
				System.out.print(String.valueOf(arr[i])+'\n');
			else System.out.print(String.valueOf(arr[i])+' ');
		}
		for(int i=0;i!=cnt;++i)
		{
			System.out.print(arr[i]);
		}
	}
}