Go: package main

import "fmt"


func main() {
	for i := 1; i <= 9; i++ {
		for i2 := 1; i2 <= 9; i2++ {
			fmt.Printf("%d ?? %d = %d\n", i, i2, i*i2)
		}
	}
}

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>
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<bits/stdc++.h>
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>
#include <vector>
using namespace std;
typedef long long ll;

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;

const int max = 9 + 1;

int main() {

	int a, b;

	for (a = 1; a < max; a++) {
		for (b = 1; b < max; b++) {
			cout << a << "x" << b << "=" << (a*b) << endl;
		}
	}

	return 0;
}

C++: #include <iostream>
#include <algorithm>
#include <string>
#include <stack>
#include <queue>
#include <set>

using namespace std;

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

	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<<"\n";
    }
    return 0;
}

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

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

int main(){

	int a=0;
	int b=0;
	int ans;

	for(int count=0;count<81;count++)
	{
		a++;
		if(0==a%10){a=1;}

		if(a==1)
		{
			b++;
			if(0==b%10){b=1;}
		}
	ans=b*a;
	cout<<b<<"x"<<a<<"＝"<<ans<<endl;
	}
    return 0;
}

C++: #include<cstdio>
int i,j;
main(){
    for(;i++<9;)for(j=1;j<10;)printf("%dx%d=%d\n",i,j++,i*j);
}

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

int main(){
	int k = strtol("1000000000000", 0, 10);
	return k < -65536;
}

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

int main()
{
int x;
for (int i = 0; x < (int)1e9; i++){
x += i / 2;
}
}

C++: #include <stdio.h>

int main()
{

}

C++: #include <cstdio>

using namespace std;

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

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

C++: #include<iostream>

using namespace std;


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

C++: using System;
//using System.Collections.Generic;
//using System.Linq;
//using System.Text;
//using System.Threading.Tasks;

class Program
{
    static void Main()
    {
        for(int i = 1; i < 10 ; ++i)
        {
            for(int j = 1; j < 10 ; ++j)
            {
                Console.WriteLine("{0}x{1}={2}",i,j,i*j);
            }
        }
    }
}

C++: #define _USE_MATH_DEFINES
#include <algorithm>
#include <cstdio>
#include <functional>
#include <iostream>
#include <cstring>
#include <climits>
#include <cmath>
#include <map>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <time.h>
#include <vector>
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> i_i;
typedef pair<ll, int> ll_i;
typedef pair<double, int> d_i;
typedef pair<ll, ll> ll_ll;
typedef pair<double, double> d_d;
struct edge { int u, v; ll w; };
 
int MOD = 1000000007;

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<cstdio>
using namespace std;
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 <bits/stdc++.h>
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 <cstdlib>
using namespace std;

int main(){
	int k = strtol("1000000000000", 0, 10);
	return k < -32767;
}

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

int main() {
  int a = 1;
  int b = 1;
  for (a < 10 && b < 9) {
    cout << b << "x" << a << "=" << a*b << endl;
    ++a;
    if (a == 10 && b <= 8) {
    ++b;
    a = 1;
  }
  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<iostream>
using namespace std;

int main(void){

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

}