char* 函數 返回值使用，ascii碼轉int組合成的字符串

char* 函數 返回值使用，ascii碼轉int組合成的字符串

#include <iostream>
#include <string.h>
#include <stdio.h>
#include <string>
using namespace std;

static inline bool get_ascii_string(const string& name, char* get_char) {
    int i = 0, n;
    const char *s = name.c_str();
    char buf[name.length() * 4 ], *p;
    memset(buf, 0, sizeof(buf));
    p = buf;
    for (i = 0; i < strlen(s); i++) {
        n = sprintf(p, "%d", s[i]);
        p += n;
    }
    strcpy(get_char, buf);
    return true;
}

static inline char* new_get_ascii_string(const string& name) {
    int i = 0, n;
    const char *s = name.c_str();
    char* buf = new char[strlen(s) * 4];
    char *p;
    p = buf;
    for (i = 0; i < strlen(s); i++) {
        n = sprintf(p, "%d", s[i]);
        p += n;
    }
    return buf;
}


int main(int argc, char *argv[]) {
    /*
    *這段代碼的功能是輸入一個字符串test_string 返回這個字符串裏面 ascii碼對應的int值組成的字符串
    *可以通過這個功能測試char* 函數 返回值的使用
    */
    string test_string = "abcd我";
    for (int i = 0; i < 10; i++) {
        test_string = test_string + "abc";
    }
    cout << "test_string == " << test_string << endl;
    cout<<"test_string.length()="<<test_string.length()<<endl;
    /*這是第一種實現方式*/
    char* test = new char[test_string.length() * 4 ]; //獲取的字符串是存放的字符串的 最大數的 4倍
    get_ascii_string(test_string, test);
    cout << "test1 == " << test << endl;
    delete[] test;
    cout << "over1"<<endl;

    /*這是第二種實現方式*/
    char* test2 = new_get_ascii_string(test_string);
    cout << "test2 == " <<test2<< endl;
    delete[] test2;
    cout << "over2"<<endl;


}