c program to read age of 15 person and total baby age,school age and adult age

#include<stdio.h>
main()
{
int n,i,s1=0,s2=0,s3=0;
printf("Enter the age of 15 person:");
do
{
scanf("%d",&n);
if(n>=0&&n<=5)
s1=s1+n;
else if(n>=6&&n<=17)
s2=s2+n;
else
s3=s3+n;
i++;
}
while(i<=15);
printf("Total Babys age=%d\n",s1);
printf("Total school students age=%d\n",s2);
printf("Total adult age=%d",s3);
}