Bound checking in c/c++

[Karaoulis Marios]

Exo auto to programma
#include <stdio.h>
#include <stdlib.h>
int main()
{
float a[5];
int i;
a[0]=0;
a[1]=1;
a[2]=2;
a[3]=3;
a[4]=4;
a[15]=5;
for (i=0;i<=4;i++) printf("%f\n",a[i]);
printf("%f\n",a[15]);
return 0;
} 

to kano compile os 
gcc -fbound-checking foo.c

Alla den gurnaei kapio warning
otan to trexo gyrnaei apotelesma gia to a[15]
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