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<cstdio>
 
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;
auto dodo() {
  for(auto i=0; i<10; i++)
    cout << i+1 << 'x' << i+1 << '=' << (i+1)*(i+1) << endl;
}

int main() {
  dodo();
  return 0;
}

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

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

    return 0;
}

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

int main()
{
	std::auto_ptr<int> p;
	std::unique_ptr<int> q;
	std::shared_ptr<int> r;
}

C++: #include<stdio.h>

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

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

int main(){
  cout<<"1x1=1"<<endl;
  cout<<"1x2=2"<<endl;
  cout<<"1x3=3"<<endl;
  cout<<"1x4=4"<<endl;
  cout<<"1x5=5"<<endl;
  cout<<"1x6=6"<<endl;
  cout<<"1x7=7"<<endl;
  cout<<"1x8=8"<<endl;
  cout<<"1x9=9"<<endl;
  cout<<"2x1=2"<<endl;
  cout<<"2x2=4"<<endl;
  cout<<"2x3=6"<<endl;
  cout<<"2x4=8"<<endl;
  cout<<"2x5=10"<<endl;
  cout<<"2x6=12"<<endl;
  cout<<"2x7=14"<<endl;
  cout<<"2x8=16"<<endl;
  cout<<"2x9=18"<<endl;
  cout<<"3x1=3"<<endl;
  cout<<"3x2=6"<<endl;
  cout<<"3x3=9"<<endl;
  cout<<"3x4=12"<<endl;
  cout<<"3x5=15"<<endl;
  cout<<"3x6=18"<<endl;
  cout<<"3x7=21"<<endl;
  cout<<"3x8=24"<<endl;
  cout<<"3x9=27"<<endl;
  cout<<"4x1=4"<<endl;
  cout<<"4x2=8"<<endl;
  cout<<"4x3=12"<<endl;
  cout<<"4x4=16"<<endl;
  cout<<"4x5=20"<<endl;
  cout<<"4x6=24"<<endl;
  cout<<"4x7=28"<<endl;
  cout<<"4x8=32"<<endl;
  cout<<"4x9=36"<<endl;
  cout<<"5x1=5"<<endl;
  cout<<"5x2=10"<<endl;
  cout<<"5x3=15"<<endl;
  cout<<"5x4=20"<<endl;
  cout<<"5x5=25"<<endl;
  cout<<"5x6=30"<<endl;
  cout<<"5x7=35"<<endl;
  cout<<"5x8=40"<<endl;
  cout<<"5x9=45"<<endl;
  cout<<"6x1=6"<<endl;
  cout<<"6x2=12"<<endl;
  cout<<"6x3=18"<<endl;
  cout<<"6x4=24"<<endl;
  cout<<"6x5=30"<<endl;
  cout<<"6x6=36"<<endl;
  cout<<"6x7=42"<<endl;
  cout<<"6x8=48"<<endl;
  cout<<"6x9=54"<<endl;
  cout<<"7x1=7"<<endl;
  cout<<"7x2=14"<<endl;
  cout<<"7x3=21"<<endl;
  cout<<"7x4=28"<<endl;
  cout<<"7x5=35"<<endl;
  cout<<"7x6=42"<<endl;
  cout<<"7x7=49"<<endl;
  cout<<"7x8=56"<<endl;
  cout<<"7x9=63"<<endl;
  cout<<"8x1=8"<<endl;
  cout<<"8x2=16"<<endl;
  cout<<"8x3=24"<<endl;
  cout<<"8x4=32"<<endl;
  cout<<"8x5=40"<<endl;
  cout<<"8x6=48"<<endl;
  cout<<"8x7=56"<<endl;
  cout<<"8x8=64"<<endl;
  cout<<"8x9=72"<<endl;
  cout<<"9x1=9"<<endl;
  cout<<"9x2=18"<<endl;
  cout<<"9x3=27"<<endl;
  cout<<"9x4=36"<<endl;
  cout<<"9x5=45"<<endl;
  cout<<"9x6=54"<<endl;
  cout<<"9x7=63"<<endl;
  cout<<"9x8=72"<<endl;
  cout<<"9x9=81"<<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<=9;i++){
		for(int j=1;j<=9;j++){
			cout<<i<<"*"<<j<<"="<<i*j<<endl;
		}
	}
	return 0;
}

C++: #include<stdio.h>
int a, b;int main(){for(a=1;a<=9;a++)for(b=1;b<=9;b++)printf("%dx%d=%d\n",a,b,a*b);return 0;}

C++: #include<iostream>
#include<string>
using namespace std;
     
int main(){
  int a,b;
  for(a=1;a<=9;a++){
    for(b=1;b<=9;b++){
      cout<<a<<"x"<<b<<"="<<a*b<<endl;
    }
  }
  return 0;
}

C++: #include<stdio.h>
int main()
{
    int a,b;
    for(a=1;a<=9;a++)
    {
        for(b=1;b<=9;b++)
        {
            printf("%dx%d=%d\n",a,b,a*b);
        }
    }
    return 0;
}

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

int main(){

	int a = 1;
	int b = 1;
	int r = 0;

	for(a=1;a<=9;a++){
		for(b=1;b<=9;b++){
			r = a*b;
			cout << a;
			cout << "x";
			cout << b;
			cout << "=";
			cout << r << endl;
		}
		b = 1;
	}

    return 0;
}

C++: #include<stdio.h>
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);
		}
	}
	return 0;
}

C++: #include <iostream>
#define REP(i,n) for(int i=0;i<n;i++)
using namespace std;

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

C++: #include<stdio.h>
int i,j,k;main(){for(;i<81;i++)j=i/9+1,k=i%9+1,printf("%dx%d=%d\n",j,k,j*k);}

C++: #include <iostream>
#include <queue>
#include <vector>
#include <set>
#include <algorithm>
#include <stdio.h>
#define int long long
inline int in() { int32_t x; scanf("%d", &x); return x ;}
using namespace std;
const int INF = 1e18;
const int MAX_N = 1e5 + 5;
int32_t main()
{
    for (int i = 1 ; i <= 9 ; i ++)
    {
        for (int x = 1 ; x <= 9 ; x ++)
        {
            printf("%dx%d=%d",i,x,i*x);
            cout << endl;
        }
    }
    cout << endl;
}

C++: #include <iostream>
#include <string>

using namespace std;

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

C++: #include <iostream>
#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;
}