ane lagi belajar pointer bahasa pemrograman c....
ane punya masalah saat nge-run code dibawah ini
hasi run programmnya keluar sama errornya....

ini kodenya gan:

#include <stdio.h>

#include <stdlib.h>



int main (void){

 int *Px;

 

 int x=10;



 

 Px=(int *) malloc(sizeof(int));

 Px=&x;

 printf("nilai P \t=%p\n",Px);

 printf("nilai *P \t=%d\n",*Px);

 

 free(Px);

 

 

 return 0;

}

ini errornya:

nilai P =0xbf9c0058

nilai *P =10

*** glibc detected *** ./program: free(): invalid pointer: 0xbf9c0058 ***

======= Backtrace: =========

/lib/i386-linux-gnu/i686/cmov/libc.so.6(+0x70f01)[0xb7694f01]

/lib/i386-linux-gnu/i686/cmov/libc.so.6(+0x72768)[0xb7696768]

/lib/i386-linux-gnu/i686/cmov/libc.so.6(cfree+0x6d)[0xb769981d]

./program[0x80484db]

/lib/i386-linux-gnu/i686/cmov/libc.so.6(__libc_start_main+0xe6)[0xb763ae46]

./program[0x80483b1]

======= Memory map: ========

08048000-08049000 r-xp 00000000 08:01 3015170 /root/LUNDU/Lundu/coding/Cprogram/program

08049000-0804a000 rw-p 00000000 08:01 3015170 /root/LUNDU/Lundu/coding/Cprogram/program

08ad7000-08af8000 rw-p 00000000 00:00 0 [heap]

b74e3000-b74ff000 r-xp 00000000 08:01 2228998 /lib/i386-linux-gnu/libgcc_s.so.1

b74ff000-b7500000 rw-p 0001b000 08:01 2228998 /lib/i386-linux-gnu/libgcc_s.so.1

b7500000-b7521000 rw-p 00000000 00:00 0 

b7521000-b7600000 ---p 00000000 00:00 0 

b7623000-b7624000 rw-p 00000000 00:00 0 

b7624000-b7780000 r-xp 00000000 08:01 2228914 /lib/i386-linux-gnu/i686/cmov/libc-2.13.so

b7780000-b7781000 ---p 0015c000 08:01 2228914 /lib/i386-linux-gnu/i686/cmov/libc-2.13.so

b7781000-b7783000 r--p 0015c000 08:01 2228914 /lib/i386-linux-gnu/i686/cmov/libc-2.13.so

b7783000-b7784000 rw-p 0015e000 08:01 2228914 /lib/i386-linux-gnu/i686/cmov/libc-2.13.so

b7784000-b7787000 rw-p 00000000 00:00 0 

b77a2000-b77a5000 rw-p 00000000 00:00 0 

b77a5000-b77a6000 r-xp 00000000 00:00 0 [vdso]

b77a6000-b77c2000 r-xp 00000000 08:01 2228950 /lib/i386-linux-gnu/ld-2.13.so

b77c2000-b77c3000 r--p 0001b000 08:01 2228950 /lib/i386-linux-gnu/ld-2.13.so

b77c3000-b77c4000 rw-p 0001c000 08:01 2228950 /lib/i386-linux-gnu/ld-2.13.so

bf9a1000-bf9c2000 rw-p 00000000 00:00 0 [stack]

Aborted

need help dong gan dan para master c sekalian...
ane udah lama cari cara buat ngatasin ini tapi belum dapat juga......