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----------------------------------------------------------------------------------------------------------------------
#include <bits/stdc++.h>

//using namespace--------------------------------------------------------------------------------------------------------------
using namespace std;

//define-----------------------------------------------------------------------------------------------------------------------
#define rep(i, n) for(int i = 0; i < n; i++)
#define FOR(i, s, n) for(int i = s; i < n; i++)
#define per(i, n) for(int i = n; i >= 0; i--)
#define ROF(i, s, n) for(int i = s; i >= n; i--)
#define FORIT(i, A) for (auto i : A)
#define PRINT(x) cout << (x) << endl
#define ALL(a) (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define FOREACH(i, n) for (__typeof((n).begin()) i = (n).begin(); i != (n).end(); ++i)
#define SZ(a) int((a).size())
#define EACH(i,c) for(typeof((c).begin()) i=(c).begin(); i!=(c).end(); ++i)
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())
#define INF 1 << 25
#define CLR(a) memset((a), 0 ,sizeof(a))
#define dump(x) cerr << #x << " = " << (x) << endl;
#define debug(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << endl;
#define sq(n) (n) * (n)

//typedef----------------------------------------------------------------------------------------------------------------------
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;
typedef unsigned int uint;
typedef unsigned long long ull;

//const------------------------------------------------------------------------------------------------------------------------
const double EPS = 1e-10;
const double PI = acos( -1.0 );

//global-----------------------------------------------------------------------------------------------------------------------

//function---------------------------------------------------------------------------------------------------------------------
int main() {
    FOR(i, 1, 10){
        FOR(j, 1, 10){
            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<10;i++){
		for(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++)
		  printf("%dx%d=%d\n",i,j,i*j);
	return 0;
}

C++: #include <iostream>
#include <stdlib.h>

using namespace std;

int main(int argc, char *argv[])
{
   for(int i = 1; i<=9;++i)
   {
   		for(int j = 1; j<= 9;++j)
     		cout<<i<<"x"<<j<<endl;   
   }
  //system("PAUSE");	
  return 0;
}

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

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