Convert int into char? it’s for arduino?

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How to convert int to char? what I exactly need is if i press digital 2 it have to post 1 again if press digital 2 it have to post 2 if again it have to post 3. please help me

I’m doing arduino ethernet Project, for that i need counter program, but here i can’t able to post a “int” values in twiter, it accept only char,
i’ m using uno and w15 shield

program is

#include <SPI.h>
#include <Ethernet.h>
#include <Twitter.h>

// our event messages
char b1[]=”one”;
char b2[]=”two”;
char b3[]=”three”;
char b4[]=”four”;

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; // create MAC address for ethernet shield
byte ip[] = { 10,0,0,69}; // choose your own IP for ethernet shield

Twitter twitter(“aaaaaaa”); // replace aaaaaaa with your token
void setup()
{
delay(50);
Ethernet.begin(mac, ip);
Serial.begin(96);
pinMode(2, INPUT);
pinMode(3, INPUT);
pinMode(4, INPUT);
pinMode(5, INPUT);
}

void tweet(char msg[])
{
Serial.println(“connecting …”);
if (twitter.post(msg))
{
int status = twitter.wait(&Serial);
if (status == 2)
{
Serial.println(“OK.”);
} else
{
Serial.print(“failed : code “);
Serial.println(status);
}
} else
{
Serial.println(“connection failed.”);
}
}

void loop()
{
if (digitalRead(2)==HIGH)
{ tweet(b1); delay(20); }
if (digitalRead(3)==HIGH)
{ tweet(b2); delay(20); }
if (digitalRead(4)==HIGH)
{ tweet(b3); delay(20); }
if (digitalRead(5)==HIGH)
{ tweet(b4); delay(20); }
}

✅ Answers

? Best Answer

  • chars and ints are just different ways of representing numbers. There’s really no need to convert from one to another. The only technical difference between the two is that ints can be negative and can have much higher values than chars. All the following code works:

    int a = ‘a’;
    char b = 98;
    char[] c = {97,98,99,1};

    printf(“int a as an int is %d but as a char it’s %cn”, a, a);
    printf(“int b as an int is %d but as a char it’s %cn”, b, b);
    printf(“Char c is %sn”, c);

    this outputs:

    int a as an int is 97 but as a char it’s a
    int b as an int is 98 but as a char it’s b
    Char c is abcd

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