Go: package main

import "fmt"
import "strconv"

func main() {
  for i := 1; i <= 9; i++ {
    for j := 1; j <= 9; j++ {
      res := i * j
      fmt.Println(
        strconv.Itoa(i) + "x" + strconv.Itoa(j) + "=" + strconv.Itoa(res)
      )
    }
  }
}

C++: #include <cstdio>
#include <cstdlib>
#include <cmath>
#include <climits>
#include <cfloat>
#include <map>
#include <utility>
#include <set>
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include <algorithm>
#include <functional>
#include <sstream>
#include <complex>
#include <stack>
#include <queue>
using namespace std;
typedef long long ll;
typedef vector<int> vint;
typedef pair<int, int> pint;
#define MOD 1000000007 //10^9+7
#define INF 1000000000 //10^9

int main (int argc, const char * argv[])
{
    for (int i=1;i<10; i++) {
        for (int j=1; j<10; j++) {
            printf("%dx%d=%d\n",i,j,i*j);
        }
    }
    
    
    return 0;
}

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

int main (){

cout << "Hello World";

return 0;
}

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

int main(){
	for(int i = 1; i < 10; i++){
		for(int j = 1; j < 10; j++){
			cout << i << "x" << j << "=" << i*j << endl;
		}
	}
}

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 << '\n' ;
		};};
}

C++: //AOJ 0000
//include
#include<cstdio>
#include<cctype>
#include<cstring>
#include<cstdlib>
#include<algorithm>
#include<stack>
#include<queue>
#include<deque>
#include<vector>
#include<list>
#include<bitset>
#include<set>

//using namespace
using namespace std;

//define

//variable
short a, b;

//function
int main(){
  for(a = 1; a <= 9; a++)
    for(b = 1; b <= 9; b++)
      printf("%dx%d=%d", a, b, a * b);
  return 0;
}

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

C++: 
/* QQ.cpp */
#include <iostream>
using namespace std;

int main()
{
	for (int i = 1; i < 10; ++i)
		for (int j = 1; j < 10; ++j) {
			cout << i << 'x' << j << '=' << i*j;

			if (i != 9 || j != 9) cout << "\n";
		}

	return 0;
}

C++: //+option:-ansi -Wall -Wextra
//+task:hdu 1216
//press <F7> to update the source to mark file.
//press <S-F7> to open the page
#include "vector"
#include "iostream"
#include "algorithm"
#include "cmath"
#include "cstdio"
#include "cstdlib"
#include "cstring"
#include "iterator"
using namespace std;
#define inc(over, ...)\
        do\
        {\
                static int over = 0;\
                (over)++;\
                __VA_ARGS__;\
        }while(0)
#define rangedo(i, s, t)\
        i=s; i!=t; i++
#define range(a, b, ...)\
	__typeof(a) _ = a; (_ != (b)) && (bool(__VA_ARGS__)); _++
#define each(a, b, ...)\
	for(range(a, b, true)) __VA_ARGS__
#define exist(a, b, pred)\
	({\
	        bool ok=false;\
		for(range(a,b,!ok))\
			if((pred)) ok = true;\
		ok;\
	})
#define countdown(a, ...)\
	for(int _ = a; _--; ) __VA_ARGS__
/* Good Day */

#define x_lambda(args, index, ...)({\
		typedef __typeof(args) type, reft;\
		static reft _1, _2;\
		typedef __typeof(({ ({__VA_ARGS__;});})) rett;\
		struct __class{\
		static rett __func1 (const reft &_1){return rett(({__VA_ARGS__;}));}\
		static rett __func2 (const reft &_1, const reft &_2) {return rett(({__VA_ARGS__;}));}}; \
		&__class::__func##index;})
#define $lb (
#define $1(type)  x_lambda $lb type, 1 
#define $2(type)  x_lambda $lb type, 2 
#define $lambda(...) __VA_ARGS__)
#define $cin(type)   istream_iterator<type>(cin)
#define $cin_end(type) istream_iterator<type>()
#define $cout(type) ostream_iterator<type>(cout)
#define $cout_end(type) ostream_iterator<type>()
#define closure static
/* Good Day */

int main()
{
	each(1, 10)
	{
		int __ = _;
		each(1, 10)
		{
			printf("%dx%d=%d\n", __, _, __*_);
		}
	}
}

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

C++: #include<stdio.h>
int main(void)
{
puts("1x1=1");
puts("1x2=2");
puts("1x3=3");
puts("1x4=4");
puts("1x5=5");
puts("1x6=6");
puts("1x7=7");
puts("1x8=8");
puts("1x9=9");
puts("2x1=2");
puts("2x2=4");
puts("2x3=6");
puts("2x4=8");
puts("2x5=10");
puts("2x6=12");
puts("2x7=14");
puts("2x8=16");
puts("2x9=18");
puts("3x1=3");
puts("3x2=6");
puts("3x3=9");
puts("3x4=12");
puts("3x5=15");
puts("3x6=18");
puts("3x7=21");
puts("3x8=24");
puts("3x9=27");
puts("4x1=4");
puts("4x2=8");
puts("4x3=12");
puts("4x4=16");
puts("4x5=20");
puts("4x6=24");
puts("4x7=28");
puts("4x8=32");
puts("4x9=36");
puts("5x1=5");
puts("5x2=10");
puts("5x3=15");
puts("5x4=20");
puts("5x5=25");
puts("5x6=30");
puts("5x7=35");
puts("5x8=40");
puts("5x9=45");
puts("6x1=6");
puts("6x2=12");
puts("6x3=18");
puts("6x4=24");
puts("6x5=30");
puts("6x6=36");
puts("6x7=42");
puts("6x8=48");
puts("6x9=54");
puts("7x1=7");
puts("7x2=14");
puts("7x3=21");
puts("7x4=28");
puts("7x5=35");
puts("7x6=42");
puts("7x7=49");
puts("7x8=56");
puts("7x9=63");
puts("8x1=8");
puts("8x2=16");
puts("8x3=24");
puts("8x4=32");
puts("8x5=40");
puts("8x6=48");
puts("8x7=56");
puts("8x8=64");
puts("8x9=72");
puts("9x1=9");
puts("9x2=18");
puts("9x3=27");
puts("9x4=36");
puts("9x5=45");
puts("9x6=54");
puts("9x7=63");
puts("9x8=72");
puts("9x9=81");
return 0;
}

C++: #include<iostream>
#include<cstdio>
using namespace std;
 
int main()
{
    for(int i = 1 ; i <= 9 ; i++){
        for(int j = 1 ; j <= 9 ; j++){
            printf("%dx%d=%d\n",i,j,i*j);
        }
    }
    return 0;
}

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

int main(){

	for(int i=1;i<10;i++){
		for(int j=1;j<10;j++){
			cout << i << "x" << j << "=" << (i*j) << endl;
		}
	}

    return 0;
}

C++: #include <stdio.h>
void 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);
		}
	}
}

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()
{
	int n = 0 , m = 0;
	for(n = m = 1;n<=9;n++)
	{
		for(m=1;m <= 9;m++)
		{

		cout << n << "x" << m << "=" << n*m << endl;

		}
	}
	return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;

int main(){
	int i,j;

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

C++: #include <bits/stdc++.h>
using namespace std;
typedef long long ll;
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }

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

C++: //#define _USE_MATH_DEFINES
#define _CRT_SECURE_NO_WARNINGS
//#include <cstdio>
//#include <cstdlib>
//#include <cmath>
#include <iostream>
#include <algorithm>
#include <cstring>
#include <vector>
#include <string>
#include <map>
#include <list>
#include <queue>
#include <set>
using namespace std;

int main(void){

	//int a, b, c;
	// char ;

	for(int i = 1;i<10;i++)
	for(int j = 1;j<10;j++)
	cout<<i<<"x"<<j<<"="<<i*j<<endl;

	return 0;
}

/*
for(i=0;i<N;i++){
	cin >> X[i];
}


for(i=0;i<N;i++){
	for(j=0;j<N;j++){
		cin >> X[i][j];
	}
}
*/

C++: #include<boost\graph\edge_coloring.hpp>
#include<cstdio>

using namespace std;
using namespace boost;

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

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