Go: package main

import (
	"fmt"
	"strconv"
)

func main() {
	for _, leftValue := range MultiplicationTableNum(9) {
		for _, rightValue := range MultiplicationTableNum(9) {
			strLeftVal, strRightVal, strMulti := strconv.Itoa(leftValue), strconv.Itoa(rightValue), strconv.Itoa(Multiplication(leftValue, rightValue))
			fmt.Println(strLeftVal + "x" + strRightVal + "=" + strMulti)
		}
	}
}

func MultiplicationTableNum(num int) []int {
	multiNum := []int{}
	for i := 1; i <= num; i++ {
		multiNum = append(multiNum, i)
	}
	return multiNum
}

func Multiplication(x, y int) int {
	return x * y
}

C++: #include <bits/stdc++.h>
using namespace std;
#define FOR(i, s, n) for(int i = s; i < (int)n; i++)
#define per(i, n) for(int i = n; i >= 0; i--)
#define ROF(i, s, n) for(int i = s; i >= (int)n; i--)
#define FORIT(i, A) for (auto i : A)
#define PRINT(x) cout << (x) << "\n"
#define ALL(a) (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define MP make_pair
#define EACH(i, n) for (__typeof((n).begin()) i = (n).begin(); i != (n).end(); ++i)
#define SZ(a) int((a).size())
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())
#define CLR(a) memset((a), 0 ,sizeof(a))
#define NCLR(a) memset((a), -1 ,sizeof(a))
#define dump(x) cout << #x << " = " << (x) << "\n";
#define debug(x) cout << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << "\n";
#define sq(n) (n) * (n)
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;
typedef vector<LL> VLL;
typedef vector<VLL> VVLL;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef priority_queue<int> maxpq;
typedef priority_queue< int, vector<int>, greater<int> > minpq;
typedef complex<double> P;
static const double EPS = 1e-10;
static const double PI = acos( -1.0 );
static const int mod = 1000000007;
static const int INF = 1 << 29;
static const LL LL_INF = 1152921504606846976;
static const int dx[] = { -1, 0, 1, 0, 1, -1, 1, -1 };
static const int dy[] = { 0, -1, 0, 1, 1, 1, -1, -1 };


int main() {
#ifdef _DEBUG
	printf( "debug\n" );
#endif
	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>
#include <ctime>
#include <cstdlib>

using namespace std;
const int NMAX = 10000;

void print(int* A, int N)
{
   cout << A[0]; 
   for (int k = 1; k < N;k++) {
     cout << " " << A[k] ; 
   }
   cout << endl;
}

bool isPrime(int n)
{
  int k = 2;
  while (k * k < n + 1) {
    if (n % k == 0) {
      return false;
    }
    k += 1; 
  }
  return true;
}


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

C++: #include <stdio.h>
#include <iostream>
#include <algorithm>
#include <vector>
#include <math.h>
#include <string>
#include <string.h>
#include <queue>
#include <map>
#define FOR(i,a,b) for (int i=(a);i<(b);i++)
#define RFOR(i,a,b) for (int i=(b)-1;i>=(a);i--)
#define REP(i,n) for (int i=0;i<(n);i++)
#define RREP(i,n) for (int i=(n)-1;i>=0;i--)
#define MAX_N 105
int vx [4]= {1,0,-1,0};
int vy [4]= {0,1,0,-1};
long long  dp[MAX_N][4][4];//dp[date][today][yesterday]
int V[MAX_N],W[MAX_N];
int data[MAX_N],B[MAX_N];
int K ,N;
using namespace std;
void init(){
}
void solve(){
  init();
  FOR(i,1,10)FOR(x,1,10)cout<<i<<"??"<<x << '='<<i*x<<endl;

}
int main(){
    solve();
}

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

C++: package com.company;
import java.io.IOException;
public class Main {
    public static void main (String[] args) throws IOException {

        for (int i = 1; i < 10; i++){
            for(int j=1;j < 10;j++){
                System.out.println(i+"??"+j);
            }
        }
    }
}

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

int main(){
	for ( int leftIdx = 1; leftIdx <= 9; ++leftIdx ) {
		for ( int rightIdx = 1; rightIdx <= 9; ++rightIdx ) {
			printf( "%dx%d=%d\n", leftIdx, rightIdx, leftIdx * rightIdx );
		}
	}
	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 <bits/stdc++.h>
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<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 <iostream>
#include <cstdio>

using namespace std;

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

C++: #include <stdio.h>

int main() {
  // ??????????????????????????????????????????
  int n,m;
  n=1;
  m=1;
  while(n<=9){
    while(m<=9){
      printf("%dx%d=%d\n",n,m,n*m);
      m++;
    }
    n++;
  }
  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 << "\n";
        }
    }
    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(){
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() {

//変数の宣言

	int i,j;


/////メイン処理/////

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

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

int main(){
int a=1,b=1,c=0;
for(;a<9;a++){
for(;b<9;b++)
{c=a*b;
cout<<a<<"x"<<b<<"="<<c<<endl;}
}
    return 0;
}

C++: #include<stdio.h>

int main(){
	while(true);
	return 0;
}