30 lines
585 B
C
30 lines
585 B
C
#include <stdio.h>
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int isValidCharacter(char character)
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{
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return ('a' <= character && character <= 'z')
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|| ('A' <= character && character <= 'Z')
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|| ('0' <= character && character <= '9');
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}
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int isPalindrome(int stringlen, char* string)
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{
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int m = 0;
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int n = stringlen - 1;
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while (m <= n) {
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if (!isValidCharacter(string[m])) m++;
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else if (!isValidCharacter(string[n])) n--;
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else if (string[m] != string[n]) return 0;
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else { m++; n--; }
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}
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return 1;
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}
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int main(int argc, char* argv[])
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{
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printf("Palindrome 1 (1): %d\n", isPalindrome(4, "abba"));
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}
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