#include <stdio.h>
unsigned int my_strlen();

main()
{
	char s[1000];
	printf("Input a sentence:");
	gets(s);
	printf("Length=%d\n", my_strlen(s));
}

unsigned int my_strlen(char *s)
{
	unsigned int len;
	len=0;
	while(s[len++]);
	return(--len);
}