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The following is a Windows / Linux systems commonly used in C / C ++ various data types Conversion Summary:
#include < stdio.h>
#include < stdlib.h>
#include < iostream>
#include < string>
#include < string.h>
int main ()
{
// 1 -> int to char []
int tmp1 = 100;
char ch1 [15];
sprintf (ch1, "% d", tmp1);
std :: cout << ch1 << std :: endl;
// 2 -> int to string
int tmp2 = 111;
char ch2 [15];
sprintf (ch2, "% d", tmp2);
std :: string str2;
str2 = std :: string (ch2);
std :: cout << str2 << std :: endl;
// 3 -> int to enum
enum 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;
// 5 -> char to int
char ch5 = '8';
int val5 = ch5 - '0'; // val5 is bounded by 0 to 9
std :: cout << val5 << std :: endl;
// 6 -> char [] to int
char arr6 [] = "12345";
int tmp6;
sscanf (arr6, "% d", & tmp6);
std :: cout << tmp6 << std :: endl;
// 7 -> char * to int
char * pch7 = "444";
int tmp7;
tmp7 = atoi (pch7);
std :: cout << tmp7 << std :: endl;
// 8 -> char * to float
char * pch8 = "55.5";
float tmp8;
tmp8 = (float) atof (pch8);
std :: cout << tmp8 << std :: endl;
// 9 -> char * to double
char * 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 string
char * 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 [255];
strncpy (arr14, str14.c_str (), sizeof (arr14));
arr14 [sizeof (arr14) - 1] = 0;
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 int
float ftmp16 = 99.99;
int tmp16;
tmp16 = static_cast < int> (ftmp16); // static_cast < int> (ftmp16 + 0.5)
std :: cout << tmp16 << std :: endl;
return 0;
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