Respuesta :

#include
int main()
{
int age;
int cnt_baby=0,cnt_school=0,cnt_adult=0;
int count=0;

while(count<15)
{
printf("Enter age of person [%d]: ",count+1);
scanf("%d",&age);

if(age>=0 && age<=5)
cnt_baby++;
else if(age>=6 && age<=17)
cnt_school++;
else
cnt_adult++;

//increase counter
count++;
}

printf("Baby age: %d\n",cnt_baby);
printf("School age: %d\n",cnt_school);
printf("Adult age: %d\n",cnt_adult);

return 0;
}