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#include <stdio.h>
int main(int argc, char *argv[])
{
if(argc != 2) {
printf("Error: you need one arg. \n");
return 1;
}
int i = 0;
for(i = 0; argv[1][i] != '\0'; i++) {
char letter = argv[1][i];
switch( letter ) {
case 'a':
case 'A':
printf("%d: 'A'\n", i);
break;
case 'e':
case 'E':
printf("%d: 'E'\n", i);
break;
case 'i':
case 'I':
printf("%d: 'I'\n", i);
break;
case 'o':
case 'O':
printf("%d: 'O'\n", i);
break;
case 'u':
case 'U':
printf("%d: 'U'\n", i);
break;
case 'y':
case 'Y':
if(i > 2) {
printf("%d: 'Y'\n", i);
}
break;
default:
printf("%d: %c is not a vowel.\n", i, letter);
}
}
return 0;
}