#include <stdio.h>

void exercise6 (char *sentence, int *ct_up, int *ct_lo, int *sz) {

	int i=0;

	while (sentence[i]!='\0') {
		if (sentence[i]>='A' && sentence[i]<='Z') {
			++*ct_up;
		}
		if (sentence[i]>='a' && sentence[i]<='z') {
			++*ct_lo;
		}
		++i;
		}

	*sz=i;
}

int main (void) {

	char phrase[30], ch=0;
	int i=0, upper=0, lower=0, size;

	printf("Input your phrase (max 30 characters): ");

	while ((ch!='\n') && (i<30)) {
		ch = getchar();
		phrase[i] = ch;
		++i;
	}

	phrase[i-1] ='\0';

	exercise6 (phrase, &upper, &lower, &size);

	printf("The phrase has %d characters. %d are uppercase and %d are lowercase.\n", size, upper, lower);
}