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pg 192, ex 11.2.

C

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  • main.c
main.c
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#include <stdio.h>

int isalpha(char c);

int isalpha(char c)
{
  return ('A'<=c && c<='Z') || ('a'<=c && c<='z');
}

int main(void) {
  printf("%d",isalpha('2'));
  return 0;
}
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