Q51

The procedure given below is required to find and replace certain characters inside an input character string supplied in array $A$. The characters to be replaced are supplied in array $oldc$, while their respective replacement characters are supplied in array $newc$. Array $A$ has a fixed length of five characters, while arrays $oldc$ and $newc$ contain three characters each. However, the procedure is flawed. void find_and_replace (char *A, char *oldc, char *newc) { for (int i=0; i<5; i++) for (int j=0; j<3; j++) if (A[i] == oldc[j]) A[i] = newc[j]; } The procedure is tested with the following four test cases. If array $A$ is made to hold the string “$abcde$”, which of the above four test cases will be successful in exposing the flaw in this procedure? None $2$ only $3$ and $4$ only $4$ only