What causes a SIGSEGV

Question

What actually is the root cause of the segmentation fault (SIGSEGV), and how can we handle it.

Answer 1

The problem is that you messed with the pointe. Check these three areas, it's supposed to be a segfault.

char *c = NULL;
...
*c; // dereferencing a NULL pointer

The second area:

char *c = "Hello";
...
c[10] = 'z'; // out of bounds, or in this case, writing into read-only memory

The Third portion:

char *c = new char[10];
...
delete [] c;
...
c[2] = 'z'; // accessing freed memory

Just check these areas, figure out what you have messed up, and fix it. I hope this helps.