如何去掉C中的空白线？

#include <stdio.h>
#include <ctype.h>

void removeWhitespace(char* str) {
    int i, j;
    for (i = 0, j = 0; str[i] != '\0'; i++) {
        if (!isspace(str[i])) {
            str[j++] = str[i];
        }
    }
    str[j] = '\0';
}

int main() {
    char str[] = "Hello,   World!";
    removeWhitespace(str);
    printf("%s\n", str);  // Output: Hello,World!
    return 0;
}

#include <stdio.h>
#include <string.h>
#include <ctype.h>

void removeWhitespace(char* str) {
    char* token;
    char* delimiter = " \t\n";  // 空格、制表符、换行符作为分隔符
    char result[100] = "";  // 存储去除空白字符后的结果

    token = strtok(str, delimiter);
    while (token != NULL) {
        strcat(result, token);
        token = strtok(NULL, delimiter);
    }

    strcpy(str, result);
}

int main() {
    char str[] = "Hello,   World!";
    removeWhitespace(str);
    printf("%s\n", str);  // Output: Hello,World!
    return 0;
}