打印字符串中最长的单词

Question

I wrote the following code

#include<stdio.h>

int main(void)
{
    int i, max = 0, count = 0, j;
    char str[] = "I'm a programmer";

    for(i = 0; i < str[i]; i++)
    {
        if (str[i] != ' ')
            count++;
        else
        {
            if (max < count)
            {
                j = i - count;
                max = count;
            }
            count = 0;
        }
    }
    for(i = j; i < j + max; i++)
        printf("%c", str[i]);

    return 0;
}

With the intention to find and print the longest word, but does not work when the longest word this in the last as I'm a programmer I printed I'm instead of programmer

How to solve this problem, someone gives me a hand

Answer 1

The terminating condition of your for loop is wrong. It should be:

    for(i = 0; i < strlen(str) + 1; i++)

and also, since at the end of string you don't have a ' ' , but you have a '\\0' , you should change:

    if (str[i] != ' ')

to:

    if (str[i] != ' ' && str[i] != '\0')

Answer 2

The issue should be rather obvious. You only update your longest found word when the character you are inspecting is a space. But there is no space after the longest word in your test string, thus updating code is never exeuted for it.

You can just plop this code after the loop and that should do the trick.

Note however you could have trivially found this by adding mere printfs showing progress of this function.