string - How to convert int to binary and concatenate as char in C++ -


i have 2 values, 0 , 30, need store it's binary representation on 1 byte each. like:

byte 0 = 00000000

byte 1 = 00011110

and concatenate them on string print ascii 0 (null) , 30 (record separator). so, not print "030", can't right here , neither command can print properly. know not nice things print.

i doing this:

string final_message = static_cast<unsigned char>(bitset<8>(0).to_ulong()); final_message +=  static_cast<unsigned char>((bitset<8>(answer.size())).to_ulong()); // answer.size() = 30 cout << final_message << endl;

not sure if it's right, never worked bitset since now. think it's right server receives messages keep telling me numbers wrong. i'm pretty sure numbers need 0 , 30 on order, so, part i'm not sure how works 3 lines, i'm putting question here.

those 3 lines right? there's better way that?

a byte (or char) holds single 8-bit value, , value same whether "view" in binary format, in decimal format, or character printed on console. it's way @ it.

see following example. first 2 examples byte1 , byte2 referred in question. unfortunately, won't see on console. therefore added example, illustrates 3 ways of viewing same value 65 in different ways. hope helps.

int main(){      char byte1 = 0b00000000;     char byte2 = 0b00011110;      std::cout << "byte1 'int value': " << (int)byte1 << "; , character: " << byte1 << endl;     std::cout << "byte2 'int value': " << (int)byte2 << "; , character: " << byte2 << endl;      char a1 = 65;     char a2 = 'a';     char a3 = 0b001000001;      std::cout << "a1 'int value': " << (int)a1 << "; , character: " << a1 << endl;     std::cout << "a2 'int value': " << (int)a2 << "; , character: " << a2 << endl;     std::cout << "a3 'int value': " << (int)a3 << "; , character: " << a3 << endl;      return 0; }

output:

byte1 'int value': 0; , character:  byte2 'int value': 30; , character:  a1 'int value': 65; , character: a2 'int value': 65; , character: a3 'int value': 65; , character:

Comments

Post a Comment

Popular posts from this blog

python Tkinter Capturing keyboard events save as one single string -

is possible store keyboard events 1 string? code below stores 1 char , prints it. card reader or bar code reader, contains collection of character/ string not 1 character @ time. goal save char pressed text variable. from tkinter import * root = tk() def key(event): text= event.char text+= event.char print ("pressed", text) def callback(event): frame.focus_set() print ("clicked at", event.x, event.y) frame = frame(root, width=100, height=100) frame.bind("<key>", key) frame.bind("<button-1>", callback) frame.pack() root.mainloop() currently, creating text variable , everytime key() function gets called, , text stores last character typed. you can define text module level variable , , use module level text inside key function - text = '' def key(event): global text text+= event.char print("pressed", text)
Read more

android - InAppBilling registering BroadcastReceiver in AndroidManifest -

i'm implementing inapp billing in android app. works well, however, i'm trying decouple broadcast receiver activity manifest. suggestion in android's trivialdrive sample: // important: dynamically register broadcast messages updated purchases. // register receiver here instead of <receiver> in manifest // because call getpurchases() @ startup, therefore can ignore // broadcasts sent while app isn't running. // note: registering listener in activity bad idea, done here // because sample. regardless, receiver must registered after // iabhelper setup, before first call getpurchases(). currently there's class extends broadcastreceiver : public class iabbroadcastreceiver extends broadcastreceiver { /** * intent action receiver should filter for. */ public static final string action = "com.android.vending.billing.purchases_updated"; private final iabbroadcastlistener mlistener; public iabbroadcastreceiver(iabbroadcastlistener listener) { m
Read more

javascript - Z-index in d3.js -

i have map , when hover effect on region of map below yellow line , circle, last ones disappear. how can solve problem? http://jsfiddle.net/ot21n9qx/ var arc = g.append("path") .style("fill", "none") .style("stroke", "yellow") .style("stroke-width", 2) .attr("d", "m" + pathorigin[0] + "," + pathorigin[1] + " q" + svgpoint[0] + "," + pathorigin[1] + " " + svgpoint[0] + "," + svgpoint[1]); var circlesize = d3.scale.linear() .domain([0, 0.5, 1]) .range([4, 10, 4]); svg not have z order draws objects in order created. need create path , circle after create highlight regions. here forked fiddle: http://jsfiddle.net/o00fzgaf/1/
Read more