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You can also check whether a character is an alphabet or not using isalpha() function. I'm working on a numerical palindrome program for class. Fw-300 #ya-qn-sort h2 /* Breadcrumb */ #ya-question-breadcrumb #ya-question-breadcrumb i #ya-question-breadcrumb a #bc .ya-q-full-text, .ya-q-text #ya-question-detail h1 html[lang="zh-Hant-TW"] .ya-q-full-text, html[lang="zh-Hant-TW"] .ya-q-text, html[lang="zh-Hant-HK"] .ya-q-full-text, html[lang="zh-Hant-HK"] .ya-q-text html[lang="zh-Hant-TW"] #ya-question-detail h1, html[lang="zh-Hant-HK"] #ya-question-detail h1 /* Trending Now */ /* Center Rail */ #ya-center-rail .profile-banner-default .ya-ba-title #Stencil . Bgc-lgr .tupwrap .comment-text /* Right Rail */ #Stencil . Fw-300 .qstn-title #ya-trending-questions-show-more, #ya-related-questions-show-more #ya-trending-questions-more, #ya-related-questions-more /* DMROS */ . If “(” encounters, then push it to the separate array. Take a expression as input and store it in the array a. If “)” encounters, then pop the top most element of the array stack and decrement the variable top by 1. Using for loop check for the “(” and “)” in the expression. If “(” encounters, then push the character to the separate array stack and increment the variable top by 1.
When the data first enters the program, or later by a lower-level routine that actually uses the data?And, the ASCII value of uppercase alphabets are from 65 to 90.If the ASCII value of the character entered by the user lies in the range from 97 to 122 or from 65 to 90, that number is an alphabet.In nearly all secure programs, your first line of defense is to check every piece of data you receive.If you can keep malicious data from entering your program, or at least keep it from being processed, your program becomes much harder to attack.