Go: // 九九を出すだけ
package main
import (
	"fmt"
	"os"
	"bufio"
)
var out = bufio.NewWriter(os.Stdout)

func main(){
	defer out.Flush()
	for i:=1; i<10; i++{
		for j:=1; j<10; j++{
			fmt.Fprintf(out, "%dx%d=%d\n", i, j, i*j)
		}
	}
}

C++: #define PUSHINT10 "ak.-"
#define PUSHINT1  "01.-"
#define PUTSPACE  "0P.-.o"
#define PUTCOLON  "0j.-.o"
#define PUTLF     "ak.-.o"
#define INCREMENT PUSHINT1".+"
#define DECREMENT PUSHINT1".-"
#define PXEM      ".pxem"
char *PROG = PUSHINT1 PUSHINT1 ".c" PUSHINT10 //10,i,i,j
".y" //while 10>i
	".v.c.t.m.v.m" //j,i,j,j
	PUSHINT10 //10,j,i,j,j
	".y" //while 10>j
		".c.c.nx.o" //i,i,j,j
		".v.t.c.n=.o" //j,i,i
		".!.n" PUTLF //i
		".m" INCREMENT //j,i
		".c.v.m" INCREMENT PUSHINT10
	".a"
	//i,j,j
	".v.s.s" PUSHINT1 ".v" INCREMENT".c" PUSHINT10
".a.s.s"PXEM;

// http://cfs.maxn.jp/neta/pxem.php
#include <cstdio>
#include <string>
#include <cstring>
#include <stack>
#include <queue>
#include <ctime>
#include <cstdlib>
#include <cmath>
using namespace std;
class Pxem{
	private:
		stack<int>	pStack;		// stack
		char		*fName;		// file name
		char		*fCont;		// file contents
		int		temp;		// temporary area
		bool		used;		// used temp?
		void	print();		// print stack
		bool	out();			// output
		void	numOut();		// output(number)
		void	input();		// input
		void	numInput();		// number input
		void	copy();			// x,y,z -> x,x,y,z
		void	throwAway();		// x,y,z -> y,z
		void	inverse();		// x,y,z -> z,y,x
		void	fileRead();		// input from file contents
		void	emu();			// run pxem using file contents
		void	getRand();		// create random number from stack[0]
		void	toTemp();		// temp = stack[0];
		void	fromTemp();		// if(used) stack.push(temp);
		void	addition();		// x,y,z -> (x+y),z
		void	subtraction();		// x,y,z -> abs(x-y),z
		void	multiplication();	// x,y,z -> (x*y),z
		void	getQuotient();		// x,y,z -> (x>y?int(x/y):int(y/x)),z
		void	getSurplus();		// x,y,z -> (x>y?int(x%y):int(y%x)),z
		void	addStr(char*);		// addStr("ab"); -> pStack.push(98);pStack.push(97);
	public:
		Pxem(char* ,char*);			// constructor from main()
		Pxem(char* ,char*,stack<int>);		// constructor from Pxem
		void	run();				// run pxem
		stack<int>	getStack() const;	// get stack
};
Pxem::Pxem(char *f, char *g):fName(f),fCont(g){srand((unsigned)time(NULL));}
Pxem::Pxem(char *f, char *g,stack<int> hoge):fName(f),fCont(g){
	srand((unsigned)time(NULL));
	stack<int>fuga;
	while(!hoge.empty()){
		fuga.push((int)hoge.top());
		hoge.pop();
	}
	while(!fuga.empty()){
		pStack.push(fuga.top());
		hoge.push(fuga.top());
		fuga.pop();
	}
}
void Pxem::run(){
	long ps		= 0;
	long slen	= strlen(fName);
	string buf;
	while(ps<slen){
		if(fName[ps]=='.'&&ps+1<slen){
			int cnt;
			int ccp;
			switch(fName[++ps]){
				case 'p':
				case 'P':
					// print stack
					addStr((char*)buf.c_str());
					buf = "";
					print();
					break;
				case 'o':
				case 'O':
					// output
					addStr((char*)buf.c_str());
					buf = "";
					out();
					break;
				case 'n':
				case 'N':
					// output(number)
					addStr((char*)buf.c_str());
					buf = "";
					numOut();
					break;
				case 'i':
				case 'I':
					// input
					addStr((char*)buf.c_str());
					buf = "";
					input();
					break;
				case '_':
					// input(number)
					addStr((char*)buf.c_str());
					buf = "";
					numInput();
					break;
				case 'c':
				case 'C':
					// x,y,z -> x,x,y,z
					addStr((char*)buf.c_str());
					buf = "";
					copy();
					break;
				case 's':
				case 'S':
					// x,y,z -> x,y
					addStr((char*)buf.c_str());
					buf = "";
					throwAway();
					break;
				case 'v':
				case 'V':
					// x,y,z -> z,y,x
					addStr((char*)buf.c_str());
					buf = "";
					inverse();
					break;
				case 'f':
				case 'F':
					// input from file contents
					addStr((char*)buf.c_str());
					buf = "";
					fileRead();
					break;
				case 'e':
				case 'E':
					// run pxem using file contents
					addStr((char*)buf.c_str());
					buf = "";
					emu();
					break;
				case 'r':
				case 'R':
					// create random number from stack[0]
					addStr((char*)buf.c_str());
					buf = "";
					getRand();
					break;
				case 'w':
				case 'W':
					addStr((char*)buf.c_str());
					buf="";
					if(!pStack.empty()){
						cnt=pStack.top();
						pStack.pop();
						if(cnt==0){
							ps++;
							cnt=1;
							while(cnt){
								if(fName[ps]=='.'){
									switch(fName[++ps]){
										case 'w':
										case 'W':
										case 'x':
										case 'X':
										case 'y':
										case 'Y':
										case 'z':
										case 'Z':
											cnt++;
											break;
										case 'a':
										case 'A':
											cnt--;
											break;
									}
								}
								ps++;
							}
							ps--;
						}
					}
					break;
				case 'x':
				case 'X':
					addStr((char*)buf.c_str());
					buf="";
					if(pStack.size()>1){
						cnt=pStack.top();
						pStack.pop();
						ccp=pStack.top();
						pStack.pop();
						if(cnt>=ccp){
							ps++;
							cnt=1;
							while(cnt){
								if(fName[ps]=='.'){
									switch(fName[++ps]){
										case 'w':
										case 'W':
										case 'x':
										case 'X':
										case 'y':
										case 'Y':
										case 'z':
										case 'Z':
											cnt++;
											break;
										case 'a':
										case 'A':
											cnt--;
											break;
									}
								}
								ps++;
							}
							ps--;
						}
					}
					break;
				case 'y':
				case 'Y':
					addStr((char*)buf.c_str());
					buf="";
					if(pStack.size()>1){
						cnt=pStack.top();
						pStack.pop();
						ccp=pStack.top();
						pStack.pop();
						if(cnt<=ccp){
							ps++;
							cnt=1;
							while(cnt){
								if(fName[ps]=='.'){
									switch(fName[++ps]){
										case 'w':
										case 'W':
										case 'x':
										case 'X':
										case 'y':
										case 'Y':
										case 'z':
										case 'Z':
											cnt++;
											break;
										case 'a':
										case 'A':
											cnt--;
											break;
									}
								}
								ps++;
							}
							ps--;
						}
					}
					break;
				case 'z':
				case 'Z':
					addStr((char*)buf.c_str());
					buf="";
					if(pStack.size()>1){
						cnt=pStack.top();
						pStack.pop();
						ccp=pStack.top();
						pStack.pop();
						if(cnt==ccp){
							ps++;
							cnt=1;
							while(cnt){
								if(fName[ps]=='.'){
									switch(fName[++ps]){
										case 'w':
										case 'W':
										case 'x':
										case 'X':
										case 'y':
										case 'Y':
										case 'z':
										case 'Z':
											cnt++;
											break;
										case 'a':
										case 'A':
											cnt--;
											break;
									}
								}
								ps++;
							}
							ps--;
						}
					}
					break;
				case 'a':
				case 'A':
					addStr((char*)buf.c_str());
					buf="";
					ps-=2;
					cnt=-1;
					while(cnt){
						if(fName[ps]=='.'){
							switch(fName[ps+1]){
								case 'w':
								case 'W':
								case 'x':
								case 'X':
								case 'y':
								case 'Y':
								case 'z':
								case 'Z':
									cnt++;
									break;
								case 'a':
								case 'A':
									cnt--;
									break;
							}
						}
						ps--;
					}
					break;
				case 't':
				case 'T':
					addStr((char*)buf.c_str());
					buf = "";
					toTemp();
					break;
				case 'm':
				case 'M':
					addStr((char*)buf.c_str());
					buf = "";
					fromTemp();
					break;
				case 'd':
				case 'D':
					addStr((char*)buf.c_str());
					buf = "";
					return;
				case '+':
					addStr((char*)buf.c_str());
					buf = "";
					addition();
					break;
				case '-':
					addStr((char*)buf.c_str());
					buf = "";
					subtraction();
					break;
				case '!':
					addStr((char*)buf.c_str());
					buf = "";
					multiplication();
					break;
				case '$':
					addStr((char*)buf.c_str());
					buf = "";
					getQuotient();
					break;
				case '%':
					addStr((char*)buf.c_str());
					buf = "";
					getSurplus();
					break;
				
				default:
					buf += fName[--ps];
			}
		}else
			buf += fName[ps];
		ps++;
	}
	if(strlen((char*)buf.c_str())>0)addStr((char*)buf.c_str());
}
inline stack<int> Pxem::getStack() const{	return pStack;}
inline void Pxem::print(){while(out());}
inline bool Pxem::out(){
	if(pStack.empty())return false;
	int aaa=pStack.top();
	putchar(aaa);
	pStack.pop();
	return true;
}
inline void Pxem::numOut(){
	if(pStack.empty())return;
	int aaa=pStack.top();
	printf("%d",aaa);
	pStack.pop();
}
inline void Pxem::input(){
	int aaa=getchar();
	pStack.push(aaa);
}
inline void Pxem::numInput(){
	int aaa;
	scanf("%d",&aaa);
	pStack.push(aaa);
}
inline void Pxem::copy(){
	int i=pStack.top();
	pStack.push(i);
}
inline void Pxem::throwAway(){if(!pStack.empty())pStack.pop();}
void Pxem::inverse(){
	queue<int>fuga;
	while(!pStack.empty()){
		fuga.push((int)pStack.top());
		pStack.pop();
	}
	while(!fuga.empty()){
		pStack.push(fuga.front());
		fuga.pop();
	}
}
inline void Pxem::fileRead(){addStr(fCont);}
void Pxem::emu(){
	Pxem newPxem(fCont,fCont,pStack);
	newPxem.run();
	stack<int>aaa=newPxem.getStack();
	stack<int>bbb;
	while(!aaa.empty()){
		bbb.push((int)aaa.top());
		aaa.pop();
	}
	while(!bbb.empty()){
		pStack.push(bbb.top());
		bbb.pop();
	}
}
inline void Pxem::getRand(){
	int aaa=rand()%pStack.top();
	pStack.pop();
	pStack.push(aaa);
}
inline void Pxem::toTemp(){
	if(pStack.empty())return;
	temp=pStack.top();
	pStack.pop();
	used=true;
}
inline void Pxem::fromTemp(){
	if(used)pStack.push(temp);
}
void Pxem::addition(){
	if(pStack.size()<2)return;
	int aa=pStack.top();
	pStack.pop();
	int bb=pStack.top();
	pStack.pop();
	pStack.push(aa+bb);
}
void Pxem::subtraction(){
	if(pStack.size()<2)return;
	int aa=pStack.top();
	pStack.pop();
	int bb=pStack.top();
	pStack.pop();
	pStack.push(abs(aa-bb));
}
void Pxem::multiplication(){
	if(pStack.size()<2)return;
	int aa=pStack.top();
	pStack.pop();
	int bb=pStack.top();
	pStack.pop();
	pStack.push(aa*bb);
}
void Pxem::getQuotient(){
	if(pStack.size()<2)return;
	int aa=pStack.top();
	pStack.pop();
	int bb=pStack.top();
	pStack.pop();
	pStack.push(aa>bb?aa/bb:bb/aa);
}
void Pxem::getSurplus(){
	if(pStack.size()<2)return;
	int aa=pStack.top();
	pStack.pop();
	int bb=pStack.top();
	pStack.pop();
	pStack.push(aa>bb?aa%bb:bb%aa);
}
void Pxem::addStr(char* str){
	int leng=strlen(str);
	while(leng--)pStack.push((int)str[leng]);
}
int main(){Pxem(PROG,"").run();}