Go: package main

import (
	"fmt"
)

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

C++: #include <iostream>
#include <assert.h>
#include <list>
#include <vector>
#include <cmath>

void ff( std::list< std::vector< std::string > > & c )
{
    // ??¢???
    std::for_each( c.begin(), c.end(),
        []( std::vector< std::string> & elem )
        { }
    ) ;

    // ?°????
    std::for_each( c.begin(), c.end(),
        []( auto & elem )
        {  }
    ) ;
}

template < typename Printer >
void f( Printer && p )
{
    p( 123 ) ;
    p( 1.23 ) ;
    p( "123" ) ;
}


void operator delete( void *, std::size_t ) noexcept ;
void operator delete[]( void *, std::size_t ) noexcept ;

template < typename T >
constexpr T sqrt( T s )
{
    T x = s / 2.0 ; // ??????????????????
    T prev = 0.0 ;

    while ( x != prev )
    { // ???????????????????????????????????§????????????2?????°?????????
        prev = x ;
        x = (x + s / x ) / 2.0 ; // ????????????2
    }
    return x ;
}


// 1927426???1927428???WA???????????????????????????????????§???
auto dodo() {

  assert(std::abs(sqrt(2.0) - std::sqrt(2)) < 1e-9);

    f( []( auto && elem ){ assert(1 && elem) ; } ) ;
  auto x = 0b101;
  assert(x == 5);
  auto k = 1.2'3'4'5'6'789;
  assert(![ x = 0 ](){ return x ; }()) ;

  auto f = []( auto x ) { return x ; } ;

  f( 0 ) ;
  f( 0.0 ) ;
  f( 'A' ) ;
  f( "hello" ) ;

  int i = 10;
  decltype(auto) a = i ;



  assert(1.23456789==k);
  for(auto i=0; i<9; i++)
    for(auto j=0; j<9; j++)
      std::cout << i+1 << 'x' << j+1 << '=' << (i+1)*(j+1) << std::endl;
}

int main() {
  dodo();
  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 << "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++){
			cout<<i<<'x'<<j<<'='<<i*j<<endl;
		}
	}
	return 0;
}

C++: #include <stdio.h>

int main ( void )
{
  puts ( "1x1=1\n1x2=2\n1x3=3\n1x4=4\n1x5=5\n1x6=6\n1x7=7\n1x8=8\n1x9=9\n2x1=2\n2x2=4\n2x3=6\n2x4=8\n2x5=10\n2x6=12\n2x7=14\n2x8=16\n2x9=18\n3x1=3\n3x2=6\n3x3=9\n3x4=12\n3x5=15\n3x6=18\n3x7=21\n3x8=24\n3x9=27\n4x1=4\n4x2=8\n4x3=12\n4x4=16\n4x5=20\n4x6=24\n4x7=28\n4x8=32\n4x9=36\n5x1=5\n5x2=10\n5x3=15\n5x4=20\n5x5=25\n5x6=30\n5x7=35\n5x8=40\n5x9=45\n6x1=6\n6x2=12\n6x3=18\n6x4=24\n6x5=30\n6x6=36\n6x7=42\n6x8=48\n6x9=54\n7x1=7\n7x2=14\n7x3=21\n7x4=28\n7x5=35\n7x6=42\n7x7=49\n7x8=56\n7x9=63\n8x1=8\n8x2=16\n8x3=24\n8x4=32\n8x5=40\n8x6=48\n8x7=56\n8x8=64\n8x9=72\n9x1=9\n9x2=18\n9x3=27\n9x4=36\n9x5=45\n9x6=54\n9x7=63\n9x8=72\n9x9=81" );

  return ( 0 );
}

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

using namespace std;


int main(void){
    
    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() {
 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 <iostream>
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <cassert>
#include <climits>
#include <algorithm>
#include <string>
#include <sstream>
#include <complex>
#include <vector>
#include <list>
#include <queue>
#include <deque>
#include <stack>
#include <map>
#include <set>
#include <fstream>

using namespace std;
#define TOSTRING(x) #x
#define SZ(x) (int)(x).size()
#define REP(i,n) for(int i=0;i<(n);i++)
#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REPR(i,n) for(int i=(n)-1;i>=0;i--)
#define ALL(s) (s).begin(), (s).end()
#define so(V) sort(ALL(V))
#define rev(V) reverse(ALL(V))
#define uni(v) v.erase( unique(ALL(v)) , v.end());
#define PAU 

typedef long long unsigned int llu;
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<bool> vb;
typedef vector<vi> vvi;
typedef vector<vll> vvll;
typedef vector<vb> vvb;
const double EPS = 1e-9;
const int MOD = 1e9 + 7;
const int INF = (1 << 28);
const ll LINF = 1e18;
const double PI = acos(-1);

int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	FOR(i, 1, 10) {
		FOR(j, 1, 10) {
			cout << i << "x" << j << "=" << i * j << endl;
		}
	}
	PAU;
	return 0;
}

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

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

C++: #include <cstdio>

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

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

int main(void){


for(int i=1;i<=9;i++){
 for(int j=1;j<=9;j++){
cout << ixj=i*j;
 }
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(){
  int i,j,k;
  for(i=1;i<10;i++){
    for(j=1;j<10;j++){
      printf("%dx%d=%d\n",i,j,i*j);
    }
  }
  return 0;
}

C++: #include<stdio.h>
main(){
  int i,j;
  for (i=0;i<10;i++){
    for (j=0;j<10;j++){
      printf("%dx%d=%d\n",i,j,i*j);
    }
  }
}

C++: #include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <cmath>
#include <cstdio>
#include <iomanip>
using namespace std;

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

#define PI 3.14159265358479

int main(){
	REP(i, 9){
		REP(j, 9){
			cout << i + 1 << "x" << j + 1 << "=" << (i + 1)*(j + 1) << "\n";
		}
	}
	return 0;
}

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

int main(void){


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

C++: #include <bits/stdc++.h>

#define REP(i, n) for(int i=0;i<(int)(n);i++)
#define ALL(x) (x).begin(),(x).end()
const int INF = 1e9;

using namespace std;
int main(){
    REP(i, 9) REP(j, 9)
        cout << i+1 << "x" << j+1 << "=" << (i+1) * (j+1) << 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 <bits/stdc++.h>
using namespace std;

#define rep(i,n) for(i=0;i<n;i++)

int main(){
    int i,k;
    rep(i,9){
        rep(k,9){
            printf("%dx%d=%d\n",i+1,k+1,(i+1)*(k+1));
        }
    }
    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<ios>
int s,e;int main(){for(;e%=9,(s+=!e++)-10;)printf("%dx%d=%d\n",s,e,s*e);}

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

C++: #include<iostream>

using namespace std;

int main() {
	for (int i = 1; i <= 9; i++) {
		for (int k = 1; k <= 9; k++) {
			cout << i << "×" << k << "=" << i*k << 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;
}