Stop computer beeping when printing the number 7


I’m printing a bunch of ascii chars to the console as a representation of binary numbers however whenever it prints out the number 7 to the console then windows makes a beeping noise.
Looking online I can see some people talking about ascii 7 making a noise but I cant seem to find where to disable it in the code.

for (size_t i = 0; i < 1160; i++)
    std::cout << "\n" << (char)decimalarray[i];

this occurs when the value in the UIN8 array is 7 and I try printing the value as a char.
printing (int)decimalarray[1157] outputs the number 7
printing (char)decimalarray[1157] outputs nothing but makes beeping noise

edit: it would probably be ideal if there was a way to only write printable characters. not easy to hardcode in the values as the program uses every ascii character there is in normal execution.

Can anyone help? thanks

>Solution :

Code 7 is bell. It is meant to do that.

To disable it, you have 2 choices.

  • Change the configuration of the terminal or OS (tell it to be silent).
  • Add a conditional to the code, to skip this character.

To do the conditional: use isprint


#include <ctype.h>
#include <iostream>

int main(){
    int c =7;
    if (isprint(c))
        std::cout <<'\n' << static_cast<char>(c);

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