C Lab8 Check vowels

#include<stdio.h>
#define size 51
int main() {
    char text[size];
    char c;
    int sizearray = 0;
    int vA = 0, vE = 0, vI = 0, vO = 0, vU = 0;

    while ((c = getchar()) != EOF) {
        text[sizearray] = c;
        sizearray++;
    }

    for (int x = 0; x < sizearray; x++) {
        switch (text[x]) {
        case 'A': vA++; break;
        case 'a': vA++; break;
        case 'E': vE++; break;
        case 'e': vE++; break;
        case 'I': vI++; break;
        case 'i': vI++; break;
        case 'O': vO++; break;
        case 'o': vO++; break;
        case 'U': vU++; break;
        case 'u': vU++; break;
        }
    }

    printf("a: %d\n", vA);
    printf("e: %d\n", vE);
    printf("i: %d\n", vI);
    printf("o: %d\n", vO);
    printf("u: %d\n", vU);
    getch();
    return 0;
}