data type conversion in c++?

[asic1984]

hi

how can i convert a double value like 0.0567 to an array of char value to send it using the udp protocol (using c++)

thanks too much for your help

 

[redhat]

this is known as typecasting

answer=(int)fltnum;

the typecast will cause the value of fltnum to be converted to an integer value before being assigned to answer.
in your case

a = (char)i; // Treat i as a char and assign it to a

 

[asic1984]

hi

thanks for your reply ,but conversion like a = (char)i;

will not be useful in case for example of double type which is 8 bytes while char is 1 byte .....in this case i need an array to store the value in as what i think
ex: double t=0.05642 this number will be converted to a char array of 6 elements

i tried that using poiters .but it didnot work

thanks for help

 

[Antharax]

the C standard library has functions for that:
(Don't forget #include "stdio.h" )

sprintf is the one you're looking for:

float theValueToConvert;
char buffer[128];

sprintf(buffer, "%.6f", theValueToConvert);

(with the 6 in the format string, the number of digits behind the comma)

more information:
https://www.cplusplus.com/ref/cstdio/sprintf.html

Antharax