Go: package main

import "fmt"

func main() {
	var Xs, Ys []float32
	Xs = make([]float32, 0)
	Ys = make([]float32, 0)
	var cnt int
	for {
		var a, b, c, d, e, f, x, y float32
		fmt.Scanf("%f %f %f %f %f %f", &a, &b, &c, &d, &e, &f)
		if a == 0 {
			break
		}
		y = (((a * f) - (d * c)) / ((a * e) - (b * d)))
		x = ((c - (b * y)) / a)
		Xs = append(Xs, x)
		Ys = append(Ys, y)
		cnt++
	}
	for i := 0; i < cnt; i++ {
		fmt.Printf("%.3f %.3f\n", Xs[i], Ys[i])
	}
}

C++: #include<cstdio>
using namespace std;
int main(){
	double matrix[4],ans[2];
	while(scanf("%lf %lf %lf %lf %lf %lf",&matrix[0],&matrix[1],&ans[0],&matrix[2],&matrix[3],&ans[1]) != EOF){
		double t = matrix[0]*matrix[3]-matrix[1]*matrix[2];
		printf("%.3lf %.3lf\n",matrix[3]*ans[0]/t-matrix[1]*ans[1]/t,matrix[0]*ans[1]/t-matrix[2]*ans[0]/t);
	}
	return 0;
}

C++: 
#include <iostream>
#include <cstdlib>
#include <cstdio>
#include <cmath>
#include <stack>
#include <cctype>
#include <complex>
#include <vector>
#include <algorithm>

using namespace std;


bool solve(){

	float a,b,c,d,e,f,g;
	while(cin>> a>> b>> c>> d>> e>> f){
		float x = (1.0/(a*e-b*d)) * (e*c - b*f);
		float y = (1.0/(a*e-b*d)) * (-c*d + a*f);
		printf("%.3f %.3f",x, y);
		printf("\n");
	}
	return true;
}

int main(){
	cout.setf(ios::fixed);
	cout.precision(10);
	solve();

	return 0;
}

C++: #include <math.h>
#include <iostream>
#include <iomanip>

using namespace std;

int main()
{
	double a, b, c, d, e, f;
	while(cin >> a >> b >> c >> d >> e >> f)
	{
		double x = (c - b*f/e) / (a - b*d/e);
		double y = (c - a*x) / b;

		

		cout << setiosflags(ios::fixed) << setprecision(3);
		cout << x << " " << y << endl;
	}
	return 0;
}

C++: #include <iostream>
#include <stdio.h>
#include <vector>
#include <algorithm>

#define REP(i,n) for(int i = 0;i<(int)n;i++)
#define FOR(i,a,b) for(int i = (a);i < (b);i++)
#define RFOR(i,a,b) for(int i = (a);i>(b);i--)

using namespace std;

int main(void){
    
    int i,j=0,k = 0,l=0,m = 0,n= 0;
    double a,b,c,d,e,f;
    double x1[1000],x2[1000];
    
    while((cin >> a >> b >> c >> d >> e >> f))
    {
    
        
        if(cin.eof()){break;}
        
        double gyouretusiki = (a*e - d*b);
    
        x1 [n]= (c/a) - (b/gyouretusiki)*(f -((d*c)/a));
    
        x2[n] = ((a) /(gyouretusiki))*(f-((d*c)/a));
        
    
        REP(i,5)
        {
            x1[n] =x1[n]*10;
            x2[n] = x2[n]*10;
        }
            x1[n] += 0.5;
            x2[n] += 0.5;
            x1[n] = (int)x1[n];
            x2[n] = (int)x2[n];
        REP(i,5)
        {
            x1[n] =x1[n]/10;
            x2[n] = x2[n]/10;
        }
        n++;
    }
    REP(i,n)
    printf("%.3f %.3f\n",x1[n],x2[n]);
    return 0;
    
}

C++: #include<iostream>
#include <stdio.h>

using namespace std;

int main(){
	double a,b,c,d,e,f;
	double x,y;
	while(cin>>a>>b>>c>>d>>e>>f){

		x=(e*c-f*b)/(e*a-b*d);
		y=(d*c-f*a)/(b*d-a*e);
		printf("%.3f %.3f\n",x,y);

	}
}

C++: #include <stdio.h>
#include <math.h>

double RoundOff(double src, int keta);

int main(void)
{
	int a,b,c,d,e,f;
	double x,y;
	
	while(scanf("%d %d %d %d %d %d",&a,&b,&c,&d,&e,&f)!=EOF)
	{
		y = (double)((a*f-d*c)/(-1*d*b+a*e));
		x = (double)((c-b*y)/a);
		
		printf("%.3f %.3f\n",RoundOff(x,4),RoundOff(y,4));
	}
	
	return 0;
}

double RoundOff(double src, int keta)
{
	// 10^keta 
	src *= pow(10.0, (double)(keta-1));
	if(src>0){
		// (int)(num+0.5) cast
		src = (int)(src+0.5);
	}
	else{
		// (int)(num-0.5)
		src = (int)(src-0.5);
	}
	// 10^-keta
	src /= pow(10.0, (double)(keta-1));
	
	return src;
}

C++: #include<iostream>
#include<cstdio>
#include<cmath>
using namespace std;


double a,b,c,d,e,f;
double A,B;//x,y座標
int main(){
  while(scanf("%lf %lf %lf %lf %lf %lf",&a,&b,&c,&d,&e,&f) !=EOF){
    
    if(a*e-b*d != 0){
      B =(c*e-f*b)/(a*e-b*d);
      A =(c -a*B)/b;
    }
 
    if(A > 0){
    A =floor((A+0.0005)*1000)/1000;
    }
    if(A < 0){
    A =floor((A-0.0005)*1000)/1000;
    }
    if(B > 0){//小数第4位を四捨五入
      B =floor((B+0.0005)*1000)/1000;
    }
    if(B <0){
    B =floor((B-0.0005)*1000)/1000;
    }
    printf("%.3f %.3f\n",B,A);
  }
  return 0;
}

C++: #include <iostream>
#include <iomanip>
using namespace std;
 
int main() {
    double a, b, c, d, e, f;
    double x, y;

    while (cin >> a >> b >> c >> d >> e >> f) {
        x = (double)(c*e - b*f)/(a*e - b*d);
        y = (double)(c*d - a*f)/(b*d - a*e);
        cout << setprecision(3) << setiosflags(ios::fixed);
        cout << x << ' ' << y << endl;
    }
    return 0;
}

C++: #include<iostream>
#include<iomanip>
using namespace std;

int main(){
  double a, b, c, d, e, f;
  while(cin >> a >> b >> c >> d >> e >>f){
    double x, y;
    x = ((b*f)/e -c)/((b*d)/e-a);
    y = ((a*f)/d -c)/((a*e)/d-b);
    if(y == -0.0) y = 0;
    if(x == -0.0) x = 0;
    cout << fixed << setprecision(3) << x << " " << y << endl;
  }
  return 0;
}

C++: #include <iostream>
#include <algorithm>
#include <iomanip>
#include <cmath>

using namespace std;
int main(){
    double a,b,c,d,e,f;
    while((cin>>a>>b>>c>>d>>e>>f)){
        double x = (c*e-b*f)/(a*e-b*d);
        double y = (c*d-a*f)/(b*d-a*e);
        x = round(1000*x) / 1000;
        y = round(1000*y) / 1000;
        if(x==0)x=0;
        if(y==0)y=0;
        cout << fixed << setprecision(3) << x << " " << y << endl;
    }
    return 0;
}

C++: #include <iostream>
#include <stdio.h>
using namespace std;

int main() {
	int a, b, c, d, e, f;
	double x, y;
	while(cin >> a >> b >> c >> d >> e >> f){
		x = (c*e-b*f)/(a*e-b*d);
		y = (f-d*x)/e;
		printf("%.3f %.3f\n", x, y);
	}
	return 0;
}

C++: #include<iostream>
using namespace std;
int main(){
	double k[60000]={0};
	int i=0;
	while(cin>>k[i++]);
	int n=i-1;
	for(int j=0;j<n;j+=6){
		double x=0,y=0,a=k[j],b=k[j+1],c=k[j+2],d=k[j+3],e=k[j+4],f=k[j+5];
		x=(c*e-b*f)/(-b*d+a*e);
		y=(c*d-a*f)/(b*d-a*e);
		cout<<x<<" "<<y<<endl;
	}
	return 0;
}

C++: #include<bits/stdc++.h>
using namespace std;
int main()
{
    float a,b,c,d,e,f;

    while(cin>>a>>b>>c>>d>>e>>f)
    {
        float x1=c*e-b*f;
        float y1=a*f-c*d;
        float z1=a*e-b*d;

        float x,y;

        if(a==0 && d==0) x=0;

        else x=x1/z1;

        if(b==0 && e==0) y=0;

        else y=(c-a*x)/b;

        if(x==-0.00) x=0.00;

        printf("%.3f %.3f\n",x,y);
    }

    return 0;
}

C++: #include <iostream>
#include <cstdio>
#include <cmath>

using namespace std;

double EPS = 1e-4;

int gcd(int a, int b) { return b != 0 ? gcd(b, a%b) : a; }

int main() {
	double a, b, c, d, e, f;
	
	while (cin >> a >> b >> c >> d >> e >> f) {
		double x, y;
		
		int div1 = gcd(a, b), div2 = gcd(b, d);
		int div = gcd(div1, div2);
		a /= div; b /= div; c /= div;
		
		div1 = gcd(d, e); div2 = gcd(e, f);
		div = gcd(div1, div2);
		d /= div; e /= div; f /= div;
		
		double s = a*f/d, s_ = a*e/d;
		if (fabs(s) < EPS) s = 0.0;
		if (fabs(s_) < EPS) s_ = 0.0;
		
		y = (c - s)/(b - s_);
		if (fabs(y) < EPS) y = 0.0;
		
		x = (c - b*y)/a;
		if (fabs(x) < EPS) x = 0.0;
		
		printf("%.3lf %.3lf\n", x, y);
	}
	
	return 0;
}

C++: #include <iostream>
using namespace std;
int main()
{
    double a,b,c,d,e,f;
    double x,y;
    while(cin >> a >> b >> c >> d >> e >> f){
        x = (e*c - b*f) / (a*e - d*b);
        y = (a*f - c*d) / (a*e - d*b);
        if(x == -0){
            x = 0;
        }
        if(y == -0){
            y = 0;
        }
        printf("%.3lf %.3lf\n", x, y);
    }
}