Modify the e-mail address validation program in Figure 13.23 sothat
it requires that at least one alphabetic character appears prior tothe at
sign, one appears between the at the sign and the period, and oneappears
after the period in order for an e-mail address to be valid.

#include <stdio.h> #define FALSE 0 3 #define TRUE 1 5 int main) 6 7 char nextChar Next character in e-mail address/ int gotAt FALSE; /* Indicates if At @ was found
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