How to clear a string in C language?

In C language, you can use the following methods to clear a string:

1. Copy the string

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

int main() {
    char str[100] = "Hello World";
    
    printf("Before clearing: %s\n", str);
    
    strcpy(str, ""); // 使用空字符串清空字符串
    
    printf("After clearing: %s\n", str);
    
    return 0;
}

1. I only need one choice.

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

int main() {
    char str[100] = "Hello World";
    
    printf("Before clearing: %s\n", str);
    
    for(int i = 0; i < strlen(str); i++) {
        str[i] = '\0'; // 使用空字符清空字符串
    }
    
    printf("After clearing: %s\n", str);
    
    return 0;
}

Regardless of the method used, it is possible to clear the string and reset it to an empty string.