Go: // 九九を出すだけ
package main
import (
	"fmt"
	"os"
	"bufio"
)
var out = bufio.NewWriter(os.Stdout)

func main(){
	defer out.Flush()
	for i:=1; i<10; i++{
		for j:=1; j<10; j++{
			fmt.Fprintf(out, "%dx%d=%d\n", i, j, i*j)
		}
	}
}

C++: // This is free and unencumbered software released into the public domain.

// Anyone is free to copy, modify, publish, use, compile, sell, or
// distribute this software, either in source code form or as a compiled
// binary, for any purpose, commercial or non-commercial, and by any
// means.

// In jurisdictions that recognize copyright laws, the author or authors
// of this software dedicate any and all copyright interest in the
// software to the public domain. We make this dedication for the benefit
// of the public at large and to the detriment of our heirs and
// successors. We intend this dedication to be an overt act of
// relinquishment in perpetuity of all present and future rights to this
// software under copyright law.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
// OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.

// For more information, please refer to <http://unlicense.org>

/****************/
/* template.hpp */
/****************/

#include <algorithm>
#include <cassert>
#include <complex>
#include <functional>
#include <iomanip>
#include <iostream>
#include <limits>
#include <numeric>

using std::abs;
using std::cerr;
using std::cout;
using std::endl;
using std::max;
using std::min;
using std::numeric_limits;
using std::swap;

struct BoolName : std::numpunct<char> {
  std::string t, f;
  BoolName (std::string t, std::string f) : t(t), f(f) {}
  std::string do_truename() const {return t;}
  std::string do_falsename() const {return f;}
};

void set_bool_name(std::string t, std::string f) {
  cout.imbue(std::locale(cout.getloc(), new BoolName(t, f)));
}

struct Initializer {
  Initializer() {
    cout << std::fixed << std::setprecision(15) << std::boolalpha;
    set_bool_name("Yes", "No");
  }
} initializer;

struct Input {
  bool eof;

  Input() : eof(false) {}

  operator char() {
    char v;
    this->eof = (std::scanf("%c", &v) != 1);
    return v;
  }

  operator int() {
    int v;
    this->eof = (std::scanf("%d", &v) != 1);
    return v;
  }

  operator long() {
    long v;
    this->eof = (std::scanf("%ld", &v) != 1);
    return v;
  }

  operator long long() {
    long long v;
    this->eof = (std::scanf("%lld", &v) != 1);
    return v;
  }

  operator double() {
    double v;
    this->eof = (std::scanf("%lf", &v) != 1);
    return v;
  }

  operator long double() {
    long double v;
    this->eof = (std::scanf("%Lf", &v) != 1);
    return v;
  }

  void ignore() const {
    getchar();
  }
} in;

template<typename T> bool chmin(T& a, T b) {return a > b ? a = b, true : false;}

template<typename T> bool chmax(T& a, T b) {return a < b ? a = b, true : false;}

template<typename T, typename S> std::function<S(T)> cast() {
  return [](const T& t) { return static_cast<S>(t); };
}

/************/
/* main.cpp */
/************/

int main() {
  for (int i = 1; i <= 9; ++i) {
    for (int j = 1; j <= 9; ++j) {
      cout << i << "x" << j << "=" << i * j << endl;
    }
  }
}

C++: #include<stdio.h>

int main() {

	for (int i = 1; i < 10; i++)for (int x = 1; x < 10;x++)printf("%dx%d=%d\n", i, x, i * x);

	return 0;
}

C++: #include<stdio.h>

int main(){
	for(int i=0;i<9;i++){
		for(int j=0;j<9;j++){
			printf("%dx%d=%d",i+1,j+1,(i+1)*(j+1));
		}
	}
}

C++: #include <iostream>

int main()
{
     for(uint8_t i=1;i<10;i++)
          for(uint8_t j=1;j<10;j++)
               std::cout<<i<<"*"<<j<<"="<<i*j<<std::endl;
     return 0;
}

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

int main(){
	int i, j;
	for(i=1;i < 10;i++){
		for(j=1;j<10;j++){
			cout << i << 'x' << j << '=' << i*j << endl;
		}
	}
    return 0;
}

C++: #include<stdio.h>
int main(){for(int i=9;i<90;i++)printf("%dx%d=%d\n",i/9,i%9+1,i/9*(i%9+1));}

C++: #include <iostream>
 
int main(){
    for(int i = 1; i < 10; ++i){
        for(int j = 1; j < 10; ++j){
            std::cout << i << "x" << j << "=" << i * j << std::endl;
        }
    }
    return 0;
}

C++: #include <iostream>

using namespace std;

int main() {
	for(int i = 1; i <= 9; i++) {
		for(int j = 1; j <= 9; j++) {
			cout << i << "x" << j << "=" << i * j << endl;
		}
	}
	return 0;
}

C++: #include <stdio.h>

int main() {

        int x,y;
        for (x=1;x<10;x++){
                for(y=1;y<10;y++){
                        printf("%dx%d=%d\n",x,y,x*y);
                }
        }

        return 0;
}

C++: import java.util.Scanner;

public class B {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n=0, m=0, t=0, p=0;
		while(true){
			n = sc.nextInt();
			m = sc.nextInt();
			t = sc.nextInt();
			p = sc.nextInt();
			if(n==0 && m==0 && t==0 && p==0) break;
			int[][] paper = new int[n][m];
			for(int i=0 ; i< n ; i++){
				for(int j=0 ; j<m ;j++){
					paper[i][j] = 1;
				}
			}
			for(int k=0 ; k<t ; k++){
				int d = sc.nextInt();
				int c = sc.nextInt();
				if(d==1){
					for(int i=0 ; i< n ; i++){
						for(int j=0 ; j<c ;j++){
							paper[i][j] *= 2;
						}
					}
					m -= c;
				}else {
					for(int i=0 ; i< c ; i++){
						for(int j=0 ; j<m ;j++){
							paper[i][j] *= 2;
						}
					}
					n -= c;
				}
			}
			
			for(int i=0 ; i<p ; i++){
				
			}
		
		}
	}
}

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

int main() {
  for(int i = 1; i <= 9; i++) {
    for(int j = 1; j <= 9; j++) {
      cout << i << 'x' << j << '=' << i*j << endl;
    }
  }
}

C++: #include <iostream>
using namespace std;
main()
{
  for(int i = 1;i<10;i++)
    for(int j = 1;j<10;j++)
	  cout << i << "x" << j << "=" << i*j << endl; 
}