C string concatenation of constants

Question

One of the answers to Why do you not use C for your web apps? contains the following:

For the C crap example below:

const char* foo = &quo         


        

Answer 1

#include 
#include 

int
main(int argc, char *argv[])
{
    char *str1 = "foo";
    char *str2 = "bar";
    char ccat[strlen(str1)+strlen(str2)+1];

    strncpy(&ccat[0], str1, strlen(str1));
    strncpy(&ccat[strlen(str1)], str2, strlen(str2));
    ccat[strlen(str1)+strlen(str2)+1] = '\0';

    puts(str1);
    puts(str2);
    puts(ccat);
}

this code concatenates str1 and str2 without the need for malloc, the output should be:

foo
bar
foobar