Go: package main
import "fmt"
func main(){
    for i:=1;i<10;i++{
        for j:=1;j<10;j++{
            fmt.Print(i)
            fmt.Print("x")
            fmt.Print(j)
            fmt.Print("=")
            fmt.Println(i*j)
        }
    }
}

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 <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 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<stdio.h>
int main(void) {
	int i, x;
	for (x = 1;x < 10;x++) {
	for (i = 1;i < 10;i++) {
		printf("%dx%d=%d\n", x, i, x*i);
	}
}
	return 0;
}#include<stdio.h>
int main(void) {
	int i;
	char ch;
	ch = getchar();
	if (ch =='A') {
		i = 1;
	}
	else if (ch=='B') {
		i = 2;
	}
	else if (ch=='C') {
		i = 3;
	}
	else if (ch=='D') {
		i = 4;
	}
	else if (ch =='E') {
		i = 5;
	}
	printf("%d\n",i);
	return 0;
}

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

C++: #include<cstdio>
#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++: test

C++: #include<stdio.h>
int main()
{
int i;
float s, a;

for (s = 1; s < 10; s = s + 1) {
for (a = 2; a <10; a = a + 1) {
 i=s*a;

printf("i=%d, i=%f\n",i );
}
}
return 0;
}

C++: object Main {
  def main(args: Array[String]): Unit = {
    for (i <- 1 to 9; j <- 1 to 9)
      println(i + "x" + j + "=" + i * j)
  }
}

C++: #include<iostream>
int main(){
	for(int i=1;i<10;++i){
		for(int j=1;j<10;++j){
			std::cout<<i<<"x"<<j<<"="<<i*j<<std::endl;
		}
	}
	return 0;
}

C++: #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;
}

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

int main(){
    for(int i=1; i!=10; i++){
        for(int j=1; j!=10; j++){
            cout << i << "??" << j << "=\n";
        }
    }

    return 0;
}

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

int main(void){
int x,y;
for(x=0;x<10;x++){
   for(y=0;y<10;y++){
    
   cout <<x<<x<<y<<x*y; 
    }
}
    return 0;
}

C++: #include<cstdio>
main(){for(int y=0;y++-9;){for(int x=1;x++-9;)printf("%dx%d=%d\n",y,x,x*y);}return 0;}

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

void solve()
{
	for(int i = 1; i < 10; ++i)
	{
		for(int j = 1; j < 10; ++j)
		{
			cout << i << "x" << j << "=" << i * j << endl;
		}
	}
}

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

C++: #include <iostream>

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

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

#define SIZE 9

using namespace std;

void trace(int, int);

int main(void) {
	for (int i = 1; i <= SIZE; i++) {
		for (int j = 1; j <= SIZE; j++) {
			trace(i, j);
		}
	}
	return 0;
}

void trace(int a, int b) {
	cout << a << "x" << b << "=" << a*b << "\n";
}

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

int main(){
	for (long i = 0; i < 9; i++){
		for (long j = 0; j < 9; j++){
			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;
		}
	}

	return 0;
}

C++: class Main {
public static void main (String[] arge) {
int a,b;
 for(a=1;a<=9 ;a++) {
	for(b=1;b<=9 ;b++){
	System.out.println(a+"x"+b+"="+(a*b));
			}
		}
	}
}

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 <iostream>
#include <string>
#include <algorithm>
#include <stack>
#include <queue>
#include <set>

using namespace std;

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

	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 <bits/stdc++.h>
using namespace std;
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;
}