need help in (getchar) and (for)

Question

include <stdio.h>

#include <string.h>

char c;

char vowels [80];

int i;

int main (){

strcpy(vowels "aeiou AEIOU");

printf(":");

c = getchar();

for (i = 0; 1<10; i++){

if (c == vowel [i]){

printf("its vowel\n");

break;

}

}