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  1. #include<stdio.h>
  2.  
  3. int main(){
  4.   char c; 
  5.   scanf("%c",&c);
  6.   switch (c){
  7.   case 'A':case 'E':case 'I':
  8.   case 'O':case 'U':case 'Y':
  9.     printf("%c is uppercase\n", c);
  10.   case 'a':case 'e':case 'i':
  11.   case 'o':case 'u':case 'y':  
  12.     printf("%c is a vowel\n",c); break;
  13.   default:      
  14.     if (c<='z' && c>='A') 
  15.         printf("%c is a consonant\n", c); 
  16.     else printf("%c is not a letter\n", c);
  17.     if (c<='Z' && c>='A') 
  18.         printf("%c is uppercase\n", c);
  19.     break;
  20.   }
  21.   return 0;
  22. }
  23.  
stdin
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d
compilation info 
prog.c: In function ‘main’:
prog.c:5: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result
stdout
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d is a consonant
https://ideone.com/rHnHg
language:
C (gcc 8.3)
created:
12 years ago
visibility:
secret

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