字符串的顺序存储

// 字符串处理
#include<stdio.h>
#include<string.h>
#define MaxSize 10

typedef struct StringNode
{
    char ch[MaxSize];      //存储字符
    int length;            //串的长度
}String;

//字符串初始化
String InitString()
{
    String string;
    string.length = 0;
    for (int i = 0; i < MaxSize; ++i) {
        string.ch[i] = i;
    }
    return string;
}

//赋值操作
void StrAssign(String* S,char *str)
{
    int len = strlen(str);     // 求str的长度不包括结尾的'\0'
    for (int i = 0; i < len; ++i) {
        S->ch[i] = str[i];
        S->length++;
    }
}

// 输出字符串
void ShowString(String*S)
{
    if(S->length == 0 )
    {
        printf("字符串是空串!\n");
        return;
    }
    for (int i = 0; i < S->length; ++i) {
            printf("%c ",S->ch[i]);
    }
    printf("字符串的长度为:%d\n",S->length);
}

// 字符串的复制 由字符串S复制出字符串T
String * StrCopy(String *S,String*T)
{
    if(S->length == 0)
    {
        printf("主串为空！\n");
    }
    for (int i = 0; i < S->length; ++i) {
        T->ch[i] = S->ch[i];
        T->length++;
    }
    return T;
}

int main()
{

    String string = InitString();
    StrAssign(&string,"Hello World");

    String str = InitString();
    StrAssign(&str,"123");

    ShowString(&string);

    String T = InitString();
    String* ss = StrCopy(&string,&T);
    ShowString(ss);

    return 0;
}