Programming in C not C++

/* What does this program do? */#include int mystery2(const char *s);//prototype int main(void) {char string[80];//create char array printf (Enter a string: "); scanf("%79s", string); printf(%d ", mystery2(string)); return 0;//indicate successful termination.}//end main//What does this function do? int mystery2(const char *s) {int x;//counter//loop through string, for (x = theta; *s != '\theta'; s++) {x++;}//end for return x;}//end function mystery2