How to copy a string using a pointer

Question

Here\'s a program I wrote to copy a string constant.

When the program is run it crashes. Why is this happening ?

#include 

char *alph         


        

Answer 1

To copy strings in C, you can use strcpy. Here is an example:

#include 
#include 

const char * my_str = "Content";
char * my_copy;
my_copy = malloc(sizeof(char) * (strlen(my_str) + 1));
strcpy(my_copy,my_str);

If you want to avoid accidental buffer overflows, use strncpy instead of strcpy. For example:

const char * my_str = "Content";
const size_t len_my_str = strlen(my_str) + 1;
char * my_copy = malloc(len_my_str);
strncpy(my_copy, my_str, len_my_str);