str upper to lower

#include<stdio.h>

void convert(char *p);

main()

{

        char a[]={"KANCHANA KARTHIKA"};

        convert(a);

        printf("%s",a);

}

void convert(char *p)

{

        while(*p!='\0')

        {

                if(*p!=32)

                {

                        *p=*p+32;

                }

                p++;

        }

}