Javaclob转String；java截取字符串；Java逗号拼接字符串；取出字符串汉字；String拼接多方式；解二元一次方程组

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欧几里得算法

解二元一次方程(最简单方法，未求最小公倍数通分)：
C语言

#include<stdio.h>
int main()
{
    
    
    double a,b,c,d,e,f;
    scanf("%lf %lf %lf %lf %lf %lf",&a,&b,&c,&d,&e,&f);
	double y = (f*a - d*c)/(a*e-d*b);
    double x = (c-b*y)/a;
    printf("\n原方程为：\n");
    printf("%.0fx+ %.0fy= %.0f\n",a,b,c);
    printf("%.0fx+ %.0fy= %.0f",d,e,f);
    printf("\n解得y=%.2f\n  x=%.2f",y,x);
	return 0;
}

Java

import java.util.Scanner;

public class Main {
    
    
	public static void main(String[] args) {
    
    
		Scanner sc = new Scanner(System.in);
		double a = sc.nextInt();
        double b = sc.nextInt();
        double c = sc.nextInt();
        double d = sc.nextInt();
        double e = sc.nextInt();
        double f = sc.nextInt();
        double area = sc.nextInt();
        double day = sc.nextInt();
        double y = (f*a - d*c)/(a*e-d*b);
        double x = (c-b*y)/a;
        double n = (area*x + area*y*day)/day;
        System.out.println("y="+y+"\tx="+x);
        System.out.println(area+"公亩可供"+n+"头牛吃"+day+"天");
        sc.close();
	}
}