Write functions to implement split-mergesort for files

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Reference no: EM1358169

1. Write a function that reads a string of digits, possibly preceded by + or -, and converts this string to the integer value it represents. Be sure that your function checks that the string is well formed, that is, that it represents a valid integer. (Hint: use the functions provided in <ctype> and <cstdlib>).
Also, write a driver programs to test the function.

2. Write functions to implement the split, merge, and mergesort algorithms for files. Also, write driver programs to test the given functions.

Reference no: EM1358169

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