如何在C中将单词数转换为整型？

#include <stdio.h>
#include <stdlib.h>

int countWords(const char *str) {
    int count = 0;
    int isWord = 0;
    
    while (*str) {
        if (*str == ' ' || *str == '\n' || *str == '\t') {
            isWord = 0;
        }
        else if (isWord == 0) {
            isWord = 1;
            count++;
        }
        str++;
    }
    
    return count;
}

int main() {
    const char *sentence = "This is a sample sentence.";
    int wordCount = countWords(sentence);
    
    printf("The number of words in the sentence is: %d\n", wordCount);
    
    return 0;
}