Question

I’m wondering if there is a function like preg_match in PHP where I can find or match a string with another string.

   //In Array `word`       // in array `part`
   "Backdoor",        0        "mark"         3 (matches "Market")
   "DVD",             1        "of"           2 (matches "Get off")
   "Get off",         2        ""            -1 (no match)
   "Market",          3        "VD"           1 (matches "DVD")

I’m thinking that if there is a function that can match just part of the string it would be great, but as far as I know there is only strcmp but that will only compare if is match or not for the whole string in which my case will always be false.

Answer 1

std::strstr(). It doesn’t do regexes, but it does do simple string-in-string matching.

const char *foo = "Quick brown fox";
const char *bar = "brown";

printf("%d\n", strstr(foo, bar) - foo);  // Displays "6"

And as you’re in C++, there’s also std::string::find():

std::string foo = "Quick brown fox";
std::string bar = "brown";

std::cout << foo.find(bar) << "\n";   // Displays "6"