I've try to compile this code:
#include <iostream>
#include <cstdlib>
using namespace std;
#define ARRAY_TAM 2
typedef int (*operacion)(int, int);
typedef const char* (*Pfchar)();
int suma(int, int);
int resta(int, int);
const char* descrSuma();
const char* descrResta();
const char* simbSuma();
const char* simbResta();
class OP
{
private:
public:
operacion op;
Pfchar descr;
Pfchar simb;
};
int main (int argv, char *argc[])
{
OP ArrayOP[ARRAY_TAM];
ArrayOP[0].op = suma;
ArrayOP[0].descr = descrSuma;
ArrayOP[1].op = resta;
ArrayOP[1].descr = descrResta;
int op1, op2;
unsigned int i;
char opcion;
bool fin = false;
while (fin != true)
{
cout << "CALCULADORA" << "\n";
cout << "===========" << "\n";
for (i = 0; (i < ARRAY_TAM); i++)
{
cout << i+1;
cout << ".- ";
cout << ArrayOP[i].descr() << "\n";
}
cout << i+1 << ".- " << "Salir" << endl;
cout << "Opcion: ";
cin >> opcion;
opcion = atoi(&opcion);
opcion--;
cout << (int)opcion << endl;
if ((opcion >= 0) && (opcion < ARRAY_TAM))
{
cout << "Operando 1: ";
cin >> op1;
cout << "Operando 2: ";
cin >> op2;
cout << "Resultado: op1 " << ArrayOP[opcion].simb()
<< " op2 = " << ArrayOP[opcion].op(op1, op2);
}
else if (opcion == ARRAY_TAM)
{
fin = true;
}
}
return 0;
}
int suma (int op1, int op2)
{return op1 + op2;}
int resta (int op1, int op2)
{return op1 - op2;}
const char* descrSuma()
{return "Suma";}
const char* descrResta()
{return "Resta";}
const char* simbSuma()
{return "+";}
const char* simbResta()
{return "-";}
An it works, but I have a lot of problems linking with gcc with debbugging symbols and it doesn't link :-(
Need Help!
Large linker error:
facon@facon-laptop:~/Windows - Mis documentos/Prog/C/Ejercicios/pedirentero$ g++ -o main main.o main.o: In function `_start':
/build/buildd/eglibc-2.10.1/csu/../sysdeps/i386/elf/start.S:65: multiple definition of `_start'
/usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crt1.o:/build/buildd/eglibc-2.10.1/csu/../sysdeps/i386/elf/start.S:65:
first defined here main.o:(.rodata+0x0): multiple definition of `_fp_hw'
/usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crt1.o:(.rodata+0x0): first defined here main.o: In function
_fini': (.fini+0x0): multiple definition of
_fini'/usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crti.o:(.fini+0x0): first defined here main.o:(.rodata+0x4): multiple definition of `_IO_stdin_used'
/usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crt1.o:(.rodata.cst4+0x0): first defined here main.o: In function
__data_start': (.data+0x0): multiple definition of
__data_start'/usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crt1.o:(.data+0x0): first defined here main.o: In function
__data_start': (.data+0x4): multiple definition of
__dso_handle'/usr/lib/gcc/i486-linux-gnu/4.4.1/crtbegin.o:(.data+0x0): first defined here main.o: In function
_init': (.init+0x0): multiple definition of
_init'/usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../lib/crti.o:(.init+0x0): first defined here
/usr/lib/gcc/i486-linux-gnu/4.4.1/crtend.o:(.dtors+0x0): multiple definition of `DTOR_END' main.o:(.dtors+0x4): first defined here
/usr/bin/ld: warning: Cannot create .eh_frame_hdr section, --eh-frame-hdr ignored. /usr/bin/ld: error in main.o(.eh_frame); no .eh_frame_hdr table will be created.
collect2: ld returned 1 exit status
PD: Edited.