c check substring code example

Example 1: check if string in string c

if(strstr(sent, word) != NULL) {
    /* ... */
}

Example 2: correct way to check a string is uninitialised in c

char x[16] = { 0 }; // note the use of the initializer, it sets the first character to 0, which is all we need to test for initialization.

if (x[0] == 0)
  // x is uninitialized.
else
  // x has been initialized