在C中使用字符串作为变量？

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

int main() {
    // 定义一个字符数组来存储字符串
    char str[20] = "Hello, World!";
    
    // 使用字符指针指向字符串字面量
    char *ptr = "Hello, C!";
    
    // 打印字符串
    printf("Using array: %s\n", str);
    printf("Using pointer: %s\n", ptr);
    
    // 字符串操作示例
    strcat(str, " Welcome to C programming.");
    printf("Modified array: %s\n", str);
    
    int len = strlen(str);
    printf("Length of the string: %d\n", len);
    
    if (strcmp(str, ptr) == 0) {
        printf("Strings are equal.\n");
    } else {
        printf("Strings are not equal.\n");
    }
    
    return 0;
}

char dest[10];
char src[] = "This is a long string";
strncpy(dest, src, sizeof(dest) - 1);
dest[sizeof(dest) - 1] = '\0'; // 确保字符串以空字符结尾

char uninitialized[20];
memset(uninitialized, 0, sizeof(uninitialized));