What (if anything) is wrong with the following code? char string_var[] = "Hello"; strcat(string_var, " and Good-bye."); cout \(<<\) string_var Assume that the code is embedded in a complete program, and that an include directive for \(\) is in the program file.

The error lies in the allocation of memory for the target array during concatenation using the strcat() function. The target array 'string_var' has only been assigned the memory required to store "Hello" and the null character, which is not sufficient for the resulting concatenated string. To fix the error, sufficient memory should be allocated for the 'string_var' array to hold both "Hello" and " and Good-bye." strings and the null character. This can be done by creating a character array with an appropriate size. In the corrected version of the code, a character array 'string_var' with size 30 is created to hold both strings and the null character, allowing the strcat() function to work correctly and output "Hello and Good-bye.".