14iii.cpp

C/C++程序设计导论（第二版）》程序源文件

#include <iostream.h>
// strlen()  Return the length of the string in the array.
// ASSUMPTION:  the string is terminated with a null char
// IN:  s is a char array containing a string
int strlen (char *s)
{	int length;
	for (length = 0; *s !='\0'; length++)
		s++;
	return (length);
}
void main()
 { char s[] = "hello my friend";
	cout << strlen(s) << endl;
 }