Dev - C++ - Imprime los triángulos indicados en la Interface de usuario

/* P13EAsterisc1.CPP

*/

#include"gotoxy.h"

#include<cstring>

#include<iostream>

#define CEN 40

#define T1 "P13Asterisc1.CPP"

#define T2 "\t ALIMENTAR NUMERO DE RENGLONES <0<n<=30 : "

#define T3 "\t ALIMENTAR CARACTER: "

#define T4 "Otro Proceso (s/n)?: "

using namespace std;

int Ent();

void Proc(int);

char Sal();

int main(void){

int nr;

char opc;

while(1){

nr=Ent();

Proc(nr);

opc=Sal();

if(opc=='n')break;

}

return 0;

}

int Ent(){

int r;

system("cls"); //clrscr();

do{

gotoxy((80-strlen(T1)-strlen(T2)-2)/2,1);

cout<<T1<<T2; cin>>r;

}while(!(r>0 && r<=30));

return r;

}

void Proc(int nr){

int i,j;

char c;

int num=1;

for(i=1;i<=nr;i++) {

for(j=1;j<=i;j++)

//if(num>9)

cout<<num++%10;

//else cout<<num;

cout<<"\n";

//num++;

}

num=0;

for(int ter=1;ter<=nr;ter++)num=num+ter;

for(i=nr;i>0;i--) {

for(j=1;j<=i;j++){

//if(num>=10)

cout<<num%10;

//else cout<<num;

num--;

}

cout<<"\n";

}

}

char Sal(){

char s;

do{

gotoxy((80-strlen(T4)+2)/2,24);

cout<<T4; cin>>s;

cout<<"\n";

s=tolower(s);

}while(!(s=='s'||s=='n'));

return s;

}