[C++知识库]字符串赋值方法小结[C语言]

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

/*逐个输出字符串中的字符*/
void const_print(const char * str);

int main(){
    /*字符数组值可改，是不可改值的常量字符串的超集*/
    /*字符串常量,不可二次赋值*/
    const char *const_str = "const string by ==> const char * ";/*默认包含了'\0'*/
    //char *const_str = (char *)"const string by ==> const char * ";/*默认包含了'\0'*/
    printf("整体字符串输出：%s\n",const_str);
    const_print(const_str);
    printf("=====================================================\n");

    /*字符数组，可以二次赋值*/
    /*方法一*/
    char str[] = "char array by ==> char str[]";/*默认包含了'\0'*/
    printf("整体字符串输出：%s\n",str);
    const_print(str);
    printf("=====================================================\n");

    /*方法二*/
    char ch_arr[] = {'c','h','a','r',' ',
                        'a','r','r','a','y',' ',
                        'b','y',' ',
                        '=','=','>',' ',
                        's','e','p','a','r','a','t','e','d',' ',
                        'c','h','a','r','s','\0'
                    };/*结尾的'\0'不可或缺*/
    printf("整体字符串输出：%s\n",ch_arr);
    const_print(ch_arr);

    return 0;
}
void const_print(const char * str){
    printf("逐个字符输出：");
    for (int i=0;i<strlen(str);i++){
        if (str[i] == '\0') break;
        printf("%c",str[i]);
    }
    printf("\n");
}

输出结果：?

整体字符串输出：const string by ==> const char *?
逐个字符输出：const string by ==> const char *?
=====================================================
整体字符串输出：char array by ==> char str[]
逐个字符输出：char array by ==> char str[]
=====================================================
整体字符串输出：char array by ==> separated chars
逐个字符输出：char array by ==> separated chars?