Program to count length of string

/*Serial No.58     [swami31.cpp]*/

#include<stdio.h>
#include<conio.h>
#include<string.h>
void main()
{
char str[10],rev[10];
int i,length=0;
clrscr();
printf("Enter the string==>");
scanf("%s",str);
for(i=0;str[i]!='\0';i++)
{
length++;
}
 printf("\nThe Length of %s is==>%d",str,length);
 length--;
 for(i=0;length>=0;i++)
 {
 rev[i]=str[length];
 length--;
 }
 rev[i]='\0';
 printf("\nReverse of ---%s--- is ==> %s",str,rev);
 getch();
 }