Go: package main

import "fmt"

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

C++: #include <cstdio>

using namespace std;

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

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);
		}
	}
}

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

using namespace std;

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);

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

C++: #include<stdio.h>
int main(void)
{
	int i,j;
	
	for(i=0; i<9; i++){
		for(j=0; j<9; j++){
			printf("%dx%d=%d",i,j,i*j);
		}
	}
}

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<<1;
  cout<<0;
  cout<<endl;
  cout<<2;
  cout<<'x';
  cout<<6;
  cout<<'=';
  cout<<1;
  cout<<2;
  cout<<endl;
  cout<<2;
  cout<<'x';
  cout<<7;
  cout<<'=';
  cout<<1;
  cout<<4;
  cout<<endl;
  cout<<2;
  cout<<'x';
  cout<<8;
  cout<<'=';
  cout<<1;
  cout<<6;
  cout<<endl;
  cout<<2;
  cout<<'x';
  cout<<9;
  cout<<'=';
  cout<<1;
  cout<<8;
  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<<1;
  cout<<2;
  cout<<endl;
  cout<<3;
  cout<<'x';
  cout<<5;
  cout<<'=';
  cout<<1;
  cout<<5;
  cout<<endl;
  cout<<3;
  cout<<'x';
  cout<<6;
  cout<<'=';
  cout<<1;
  cout<<8;
  cout<<endl;
  cout<<3;
  cout<<'x';
  cout<<7;
  cout<<'=';
  cout<<2;
  cout<<1;
  cout<<endl;
  cout<<3;
  cout<<'x';
  cout<<8;
  cout<<'=';
  cout<<2;
  cout<<4;
  cout<<endl;
  cout<<3;
  cout<<'x';
  cout<<9;
  cout<<'=';
  cout<<2;
  cout<<7;
  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<<1;
  cout<<2;
  cout<<endl;
  cout<<4;
  cout<<'x';
  cout<<4;
  cout<<'=';
  cout<<1;
  cout<<6;
  cout<<endl;
  cout<<4;
  cout<<'x';
  cout<<5;
  cout<<'=';
  cout<<2;
  cout<<0;
  cout<<endl;
  cout<<4;
  cout<<'x';
  cout<<6;
  cout<<'=';
  cout<<2;
  cout<<4;
  cout<<endl;
  cout<<4;
  cout<<'x';
  cout<<7;
  cout<<'=';
  cout<<2;
  cout<<8;
  cout<<endl;
  cout<<4;
  cout<<'x';
  cout<<8;
  cout<<'=';
  cout<<3;
  cout<<2;
  cout<<endl;
  cout<<4;
  cout<<'x';
  cout<<9;
  cout<<'=';
  cout<<3;
  cout<<6;
  cout<<endl;
  cout<<5;
  cout<<'x';
  cout<<1;
  cout<<'=';
  cout<<5;
  cout<<endl;
  cout<<5;
  cout<<'x';
  cout<<2;
  cout<<'=';
  cout<<1;
  cout<<0;
  cout<<endl;
  cout<<5;
  cout<<'x';
  cout<<3;
  cout<<'=';
  cout<<1;
  cout<<5;
  cout<<endl;
  cout<<5;
  cout<<'x';
  cout<<4;
  cout<<'=';
  cout<<2;
  cout<<0;
  cout<<endl;
  cout<<5;
  cout<<'x';
  cout<<5;
  cout<<'=';
  cout<<2;
  cout<<5;
  cout<<endl;
  cout<<5;
  cout<<'x';
  cout<<6;
  cout<<'=';
  cout<<3;
  cout<<0;
  cout<<endl;
  cout<<5;
  cout<<'x';
  cout<<7;
  cout<<'=';
  cout<<3;
  cout<<5;
  cout<<endl;
  cout<<5;
  cout<<'x';
  cout<<8;
  cout<<'=';
  cout<<4;
  cout<<0;
  cout<<endl;
  cout<<5;
  cout<<'x';
  cout<<9;
  cout<<'=';
  cout<<4;
  cout<<5;
  cout<<endl;
  cout<<6;
  cout<<'x';
  cout<<1;
  cout<<'=';
  cout<<6;
  cout<<endl;
  cout<<6;
  cout<<'x';
  cout<<2;
  cout<<'=';
  cout<<1;
  cout<<2;
  cout<<endl;
  cout<<6;
  cout<<'x';
  cout<<3;
  cout<<'=';
  cout<<1;
  cout<<8;
  cout<<endl;
  cout<<6;
  cout<<'x';
  cout<<4;
  cout<<'=';
  cout<<2;
  cout<<4;
  cout<<endl;
  cout<<6;
  cout<<'x';
  cout<<5;
  cout<<'=';
  cout<<3;
  cout<<0;
  cout<<endl;
  cout<<6;
  cout<<'x';
  cout<<6;
  cout<<'=';
  cout<<3;
  cout<<6;
  cout<<endl;
  cout<<6;
  cout<<'x';
  cout<<7;
  cout<<'=';
  cout<<4;
  cout<<2;
  cout<<endl;
  cout<<6;
  cout<<'x';
  cout<<8;
  cout<<'=';
  cout<<4;
  cout<<8;
  cout<<endl;
  cout<<6;
  cout<<'x';
  cout<<9;
  cout<<'=';
  cout<<5;
  cout<<4;
  cout<<endl;
  cout<<7;
  cout<<'x';
  cout<<1;
  cout<<'=';
  cout<<7;
  cout<<endl;
  cout<<7;
  cout<<'x';
  cout<<2;
  cout<<'=';
  cout<<1;
  cout<<4;
  cout<<endl;
  cout<<7;
  cout<<'x';
  cout<<3;
  cout<<'=';
  cout<<2;
  cout<<1;
  cout<<endl;
  cout<<7;
  cout<<'x';
  cout<<4;
  cout<<'=';
  cout<<2;
  cout<<8;
  cout<<endl;
  cout<<7;
  cout<<'x';
  cout<<5;
  cout<<'=';
  cout<<3;
  cout<<5;
  cout<<endl;
  cout<<7;
  cout<<'x';
  cout<<6;
  cout<<'=';
  cout<<4;
  cout<<2;
  cout<<endl;
  cout<<7;
  cout<<'x';
  cout<<7;
  cout<<'=';
  cout<<4;
  cout<<9;
  cout<<endl;
  cout<<7;
  cout<<'x';
  cout<<8;
  cout<<'=';
  cout<<5;
  cout<<6;
  cout<<endl;
  cout<<7;
  cout<<'x';
  cout<<9;
  cout<<'=';
  cout<<6;
  cout<<3;
  cout<<endl;
  cout<<8;
  cout<<'x';
  cout<<1;
  cout<<'=';
  cout<<8;
  cout<<endl;
  cout<<8;
  cout<<'x';
  cout<<2;
  cout<<'=';
  cout<<1;
  cout<<6;
  cout<<endl;
  cout<<8;
  cout<<'x';
  cout<<3;
  cout<<'=';
  cout<<2;
  cout<<4;
  cout<<endl;
  cout<<8;
  cout<<'x';
  cout<<4;
  cout<<'=';
  cout<<3;
  cout<<2;
  cout<<endl;
  cout<<8;
  cout<<'x';
  cout<<5;
  cout<<'=';
  cout<<4;
  cout<<0;
  cout<<endl;
  cout<<8;
  cout<<'x';
  cout<<6;
  cout<<'=';
  cout<<4;
  cout<<8;
  cout<<endl;
  cout<<8;
  cout<<'x';
  cout<<7;
  cout<<'=';
  cout<<5;
  cout<<6;
  cout<<endl;
  cout<<8;
  cout<<'x';
  cout<<8;
  cout<<'=';
  cout<<6;
  cout<<4;
  cout<<endl;
  cout<<8;
  cout<<'x';
  cout<<9;
  cout<<'=';
  cout<<7;
  cout<<2;
  cout<<endl;
  cout<<9;
  cout<<'x';
  cout<<1;
  cout<<'=';
  cout<<9;
  cout<<endl;
  cout<<9;
  cout<<'x';
  cout<<2;
  cout<<'=';
  cout<<1;
  cout<<8;
  cout<<endl;
  cout<<9;
  cout<<'x';
  cout<<3;
  cout<<'=';
  cout<<2;
  cout<<7;
  cout<<endl;
  cout<<9;
  cout<<'x';
  cout<<4;
  cout<<'=';
  cout<<3;
  cout<<6;
  cout<<endl;
  cout<<9;
  cout<<'x';
  cout<<5;
  cout<<'=';
  cout<<4;
  cout<<5;
  cout<<endl;
  cout<<9;
  cout<<'x';
  cout<<6;
  cout<<'=';
  cout<<5;
  cout<<4;
  cout<<endl;
  cout<<9;
  cout<<'x';
  cout<<7;
  cout<<'=';
  cout<<6;
  cout<<3;
  cout<<endl;
  cout<<9;
  cout<<'x';
  cout<<8;
  cout<<'=';
  cout<<7;
  cout<<2;
  cout<<endl;
  cout<<9;
  cout<<'x';
  cout<<9;
  cout<<'=';
  cout<<8;
  cout<<1;
  cout<<endl;
  return 0;
}

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

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

C++: #include <iostream>

int main(int argc, char const* argv[])
{
  int i, j;

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

  return 0;
}