以下是Windows/Linux系統中常用的C/C++各種數據類型轉換匯總：

#ifndef FBC_MESSY_TEST_DATA_TYPE_CONVERT_HPP_
#define FBC_MESSY_TEST_DATA_TYPE_CONVERT_HPP_#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <string>
#include <string.h>
#include <vector>int test_data_type_convert()
{// 1--> int to char[]int tmp1 = 100;char ch1[15];sprintf(ch1, "%d", tmp1);std::cout << ch1 << std::endl;// 2--> int to stringint tmp2 = 111;char ch2[15];sprintf(ch2, "%d", tmp2);std::string str2;str2 = std::string(ch2);std::cout << str2 << std::endl;// 3--> int to enumenum enum3 {A,B};int tmp3 = 222;enum3 val3 = static_cast<enum3>(tmp3);std::cout << val3 << std::endl;// 4--> char[] to string  char arr4[] = "this is a sample";std::string str4;str4 = std::string(arr4);std::cout << str4 << std::endl;std::string str4_;str4_.assign(arr4);std::cout << str4_ << std::endl;// 5--> char to intchar ch5 = '8';int val5 = ch5 - '0';// val5 is bounded by 0 to 9std::cout << val5 << std::endl;// 6--> char[] to intchar arr6[] = "12345";int tmp6;sscanf(arr6, "%d", &tmp6);std::cout << tmp6 << std::endl;// 7--> char* to intchar* pch7 = "444";int tmp7;tmp7 = atoi(pch7);std::cout << tmp7 << std::endl;// 8--> char* to floatchar* pch8 = "55.5";float tmp8;tmp8 = (float)atof(pch8);std::cout << tmp8 << std::endl;// 9--> char* to doublechar* pch9 = "66.666";double tmp9;tmp9 = atof(pch9);std::cout << tmp9 << std::endl;// 10--> float to char[]float tmp10 = 11.11;char ch10[20];sprintf(ch10, "%f", tmp10);std::cout << ch10 << std::endl;// 11-> int to char*int tmp11 = 777;char* pch11;char ch11[20];sprintf(ch11, "%d", tmp11);pch11 = ch11;std::cout << pch11 << std::endl;// 12--> double to char[]double tmp12 = 8.888;char arr12[20];sprintf(arr12, "%f", tmp12);std::cout << arr12 << std::endl;// 13--> char* to stringchar* pch13 = "hello, world";std::string str13;str13 = std::string(pch13);std::cout << str13 << std::endl;// 14--> string to char[]std::string str14 = "dog, cat";char arr14[256];strncpy(arr14, str14.c_str(), sizeof(arr14));arr14[sizeof(arr14) - 1] = 0;std::cout << arr14 << std::endl;char arr14_[256];strcpy(arr14_, str14.c_str());std::cout << arr14_ << std::endl;// 15--> string to const char*std::string str15 = "ha ha";const char* pch15;pch15 = str15.c_str();std::cout << pch15 << std::endl;// 16--> float to intfloat ftmp16 = 99.99;int tmp16;tmp16 = static_cast<int>(ftmp16);// static_cast<int>(ftmp16 + 0.5)std::cout << tmp16 << std::endl;// 17--> vector<float> to float*std::vector<float> vec;for (int i = 0; i < 10; i++)vec.push_back(i * 1.5);float *p = &vec[0];for (int i = 0; i < 10; i++)std::cout << p[i] << std::endl;// 18--> int[] to vector<int>int x[5] = {1, 2, 3, 4, 5};std::vector<int> v(x, x + sizeof(x) / sizeof(x[0]));for (int i = 0; i < v.size(); i++)std::cout << v[i] << std::endl;return 0;
}#endif // FBC_MESSY_TEST_DATA_TYPE_CONVERT_HPP_