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 <iostream>
using namespace std;
int main(){
  cout<<1;
  cout<<'x';
  cout<<1;
  cout<<'=';
  cout<<1;
  cout<<endl;
  cout<<1;
  cout<<'x';
  cout<<2;
  cout<<'=';
  cout<<2;
  cout<<endl;
  cout<<1;
  cout<<'x';
  cout<<3;
  cout<<'=';
  cout<<3;
  cout<<endl;
  cout<<1;
  cout<<'x';
  cout<<4;
  cout<<'=';
  cout<<4;
  cout<<endl;
  cout<<1;
  cout<<'x';
  cout<<5;
  cout<<'=';
  cout<<5;
  cout<<endl;
  cout<<1;
  cout<<'x';
  cout<<6;
  cout<<'=';
  cout<<6;
  cout<<endl;
  cout<<1;
  cout<<'x';
  cout<<7;
  cout<<'=';
  cout<<7;
  cout<<endl;
  cout<<1;
  cout<<'x';
  cout<<8;
  cout<<'=';
  cout<<8;
  cout<<endl;
  cout<<1;
  cout<<'x';
  cout<<9;
  cout<<'=';
  cout<<9;
  cout<<endl;
  cout<<2;
  cout<<'x';
  cout<<1;
  cout<<'=';
  cout<<2;
  cout<<endl;
  cout<<2;
  cout<<'x';
  cout<<2;
  cout<<'=';
  cout<<4;
  cout<<endl;
  cout<<2;
  cout<<'x';
  cout<<3;
  cout<<'=';
  cout<<6;
  cout<<endl;
  cout<<2;
  cout<<'x';
  cout<<4;
  cout<<'=';
  cout<<8;
  cout<<endl;
  cout<<2;
  cout<<'x';
  cout<<5;
  cout<<'=';
  cout<<10;
  cout<<endl;
  cout<<2;
  cout<<'x';
  cout<<6;
  cout<<'=';
  cout<<12;
  cout<<endl;
  cout<<2;
  cout<<'x';
  cout<<7;
  cout<<'=';
  cout<<14;
  cout<<endl;
  cout<<2;
  cout<<'x';
  cout<<8;
  cout<<'=';
  cout<<16;
  cout<<endl;
  cout<<2;
  cout<<'x';
  cout<<9;
  cout<<'=';
  cout<<18;
  cout<<endl;
  cout<<3;
  cout<<'x';
  cout<<1;
  cout<<'=';
  cout<<3;
  cout<<endl;
  cout<<3;
  cout<<'x';
  cout<<2;
  cout<<'=';
  cout<<6;
  cout<<endl;
  cout<<3;
  cout<<'x';
  cout<<3;
  cout<<'=';
  cout<<9;
  cout<<endl;
  cout<<3;
  cout<<'x';
  cout<<4;
  cout<<'=';
  cout<<12;
  cout<<endl;
  cout<<3;
  cout<<'x';
  cout<<5;
  cout<<'=';
  cout<<15;
  cout<<endl;
  cout<<3;
  cout<<'x';
  cout<<6;
  cout<<'=';
  cout<<18;
  cout<<endl;
  cout<<3;
  cout<<'x';
  cout<<7;
  cout<<'=';
  cout<<21;
  cout<<endl;
  cout<<3;
  cout<<'x';
  cout<<8;
  cout<<'=';
  cout<<24;
  cout<<endl;
  cout<<3;
  cout<<'x';
  cout<<9;
  cout<<'=';
  cout<<27;
  cout<<endl;
  cout<<4;
  cout<<'x';
  cout<<1;
  cout<<'=';
  cout<<4;
  cout<<endl;
  cout<<4;
  cout<<'x';
  cout<<2;
  cout<<'=';
  cout<<8;
  cout<<endl;
  cout<<4;
  cout<<'x';
  cout<<3;
  cout<<'=';
  cout<<12;
  cout<<endl;
  cout<<4;
  cout<<'x';
  cout<<4;
  cout<<'=';
  cout<<16;
  cout<<endl;
  cout<<4;
  cout<<'x';
  cout<<5;
  cout<<'=';
  cout<<20;
  cout<<endl;
  cout<<4;
  cout<<'x';
  cout<<6;
  cout<<'=';
  cout<<24;
  cout<<endl;
  cout<<4;
  cout<<'x';
  cout<<7;
  cout<<'=';
  cout<<28;
  cout<<endl;
  cout<<4;
  cout<<'x';
  cout<<8;
  cout<<'=';
  cout<<32;
  cout<<endl;
  cout<<4;
  cout<<'x';
  cout<<9;
  cout<<'=';
  cout<<36;
  cout<<endl;
  cout<<5;
  cout<<'x';
  cout<<1;
  cout<<'=';
  cout<<5;
  cout<<endl;
  cout<<5;
  cout<<'x';
  cout<<2;
  cout<<'=';
  cout<<10;
  cout<<endl;
  cout<<5;
  cout<<'x';
  cout<<3;
  cout<<'=';
  cout<<15;
  cout<<endl;
  cout<<5;
  cout<<'x';
  cout<<4;
  cout<<'=';
  cout<<20;
  cout<<endl;
  cout<<5;
  cout<<'x';
  cout<<5;
  cout<<'=';
  cout<<25;
  cout<<endl;
  cout<<5;
  cout<<'x';
  cout<<6;
  cout<<'=';
  cout<<30;
  cout<<endl;
  cout<<5;
  cout<<'x';
  cout<<7;
  cout<<'=';
  cout<<35;
  cout<<endl;
  cout<<5;
  cout<<'x';
  cout<<8;
  cout<<'=';
  cout<<40;
  cout<<endl;
  cout<<5;
  cout<<'x';
  cout<<9;
  cout<<'=';
  cout<<45;
  cout<<endl;
  cout<<6;
  cout<<'x';
  cout<<1;
  cout<<'=';
  cout<<6;
  cout<<endl;
  cout<<6;
  cout<<'x';
  cout<<2;
  cout<<'=';
  cout<<12;
  cout<<endl;
  cout<<6;
  cout<<'x';
  cout<<3;
  cout<<'=';
  cout<<18;
  cout<<endl;
  cout<<6;
  cout<<'x';
  cout<<4;
  cout<<'=';
  cout<<24;
  cout<<endl;
  cout<<6;
  cout<<'x';
  cout<<5;
  cout<<'=';
  cout<<30;
  cout<<endl;
  cout<<6;
  cout<<'x';
  cout<<6;
  cout<<'=';
  cout<<36;
  cout<<endl;
  cout<<6;
  cout<<'x';
  cout<<7;
  cout<<'=';
  cout<<42;
  cout<<endl;
  cout<<6;
  cout<<'x';
  cout<<8;
  cout<<'=';
  cout<<48;
  cout<<endl;
  cout<<6;
  cout<<'x';
  cout<<9;
  cout<<'=';
  cout<<54;
  cout<<endl;
  cout<<7;
  cout<<'x';
  cout<<1;
  cout<<'=';
  cout<<7;
  cout<<endl;
  cout<<7;
  cout<<'x';
  cout<<2;
  cout<<'=';
  cout<<14;
  cout<<endl;
  cout<<7;
  cout<<'x';
  cout<<3;
  cout<<'=';
  cout<<21;
  cout<<endl;
  cout<<7;
  cout<<'x';
  cout<<4;
  cout<<'=';
  cout<<28;
  cout<<endl;
  cout<<7;
  cout<<'x';
  cout<<5;
  cout<<'=';
  cout<<35;
  cout<<endl;
  cout<<7;
  cout<<'x';
  cout<<6;
  cout<<'=';
  cout<<42;
  cout<<endl;
  cout<<7;
  cout<<'x';
  cout<<7;
  cout<<'=';
  cout<<49;
  cout<<endl;
  cout<<7;
  cout<<'x';
  cout<<8;
  cout<<'=';
  cout<<56;
  cout<<endl;
  cout<<7;
  cout<<'x';
  cout<<9;
  cout<<'=';
  cout<<63;
  cout<<endl;
  cout<<8;
  cout<<'x';
  cout<<1;
  cout<<'=';
  cout<<8;
  cout<<endl;
  cout<<8;
  cout<<'x';
  cout<<2;
  cout<<'=';
  cout<<16;
  cout<<endl;
  cout<<8;
  cout<<'x';
  cout<<3;
  cout<<'=';
  cout<<24;
  cout<<endl;
  cout<<8;
  cout<<'x';
  cout<<4;
  cout<<'=';
  cout<<32;
  cout<<endl;
  cout<<8;
  cout<<'x';
  cout<<5;
  cout<<'=';
  cout<<40;
  cout<<endl;
  cout<<8;
  cout<<'x';
  cout<<6;
  cout<<'=';
  cout<<48;
  cout<<endl;
  cout<<8;
  cout<<'x';
  cout<<7;
  cout<<'=';
  cout<<56;
  cout<<endl;
  cout<<8;
  cout<<'x';
  cout<<8;
  cout<<'=';
  cout<<64;
  cout<<endl;
  cout<<8;
  cout<<'x';
  cout<<9;
  cout<<'=';
  cout<<72;
  cout<<endl;
  cout<<9;
  cout<<'x';
  cout<<1;
  cout<<'=';
  cout<<9;
  cout<<endl;
  cout<<9;
  cout<<'x';
  cout<<2;
  cout<<'=';
  cout<<18;
  cout<<endl;
  cout<<9;
  cout<<'x';
  cout<<3;
  cout<<'=';
  cout<<27;
  cout<<endl;
  cout<<9;
  cout<<'x';
  cout<<4;
  cout<<'=';
  cout<<36;
  cout<<endl;
  cout<<9;
  cout<<'x';
  cout<<5;
  cout<<'=';
  cout<<45;
  cout<<endl;
  cout<<9;
  cout<<'x';
  cout<<6;
  cout<<'=';
  cout<<54;
  cout<<endl;
  cout<<9;
  cout<<'x';
  cout<<7;
  cout<<'=';
  cout<<63;
  cout<<endl;
  cout<<9;
  cout<<'x';
  cout<<8;
  cout<<'=';
  cout<<72;
  cout<<endl;
  cout<<9;
  cout<<'x';
  cout<<9;
  cout<<'=';
  cout<<81;
  cout<<endl;
  return 0;
}

C++: #include <stdio.h>

int main(void)
{
	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 <stdio.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 <iomanip>
#include <vector>
#include <string>
#include <stack>
#include <queue>
#include <deque>
#include <set>
#include <map>
#include <algorithm>
#include <sstream>
#include <cstdlib>
#include <cstring>
#include <functional>
#include <numeric>
#include <cmath>
#include <climits>
#include <limits>
#include <cfloat>
#include <fstream>
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;
		} // end for
	} // end for
		
	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 i,j;main(){for(i=1;i<=9;i++)for(j=1;j<=9;j++)printf("%dx%d=%d\n",i,j,i*j);}