The length of the last word in the string (Huawei Online Training)

Describe	Calculates the length of the last word in a string, separated by a space.
Knowledge points	String, looping
Run time limit	0M
Memory limit	0
Input	A line of strings that are less than 128 in length.
Output	Integer n, the length of the last word.
Sample input	Hello World
Sample output	5

#include <stdio.h>

#include <string.h>

#include LEN 1024

int main (void)

{

int Len, I, J;

Char Str[len];

Gets (str);

len = strlen (str);

if (0 = = len)

{

return 0;

}

if (< Len)

{

return-1;

}

i = len-1;

j = 0;

while (i>=0 && str[i] = = ")

{i--;}

while (i>=0 && str[i]! = ")

{

i--;

j + +;

}

printf ("%d\n", j);

return 0;

}

The length of the last word in the string (Huawei Online Training)