First up, i know google exists, but that doesn't give any working results.
I want to convert a double value to a char array.
i tried memcpy: memcpy(sensorText,&sensorValue,sizeof(sensorValue)); but that returns some alien language stuff.
Please help, thanks in advance.
#Convert double to char array/string
wild dawn
acoustic brambleBOT
cloud glade
union data
{
char tmp[8];
double d_var;
};
int main(){
data obj;
obj.d_var ==1;
for(int x=0; x<8;x++)
printf("%c", obj.tmp[x]);
}
thank you, and how do i use that?
acoustic brambleBOT
@wild dawn Has your question been resolved? If so, run !solved :)
cloud glade
thank you, and how do i use that?
example
wild dawn
thank you
i'm trying to understand it: is it one piece of data that is either read as char or as double ? is that correct?
cloud glade
agile flare
```cpp
union data
{
char tmp[8];
double d_var;
};
int main(){
data obj;
obj.d_v...
That's C++ but we're in the C channel
cloud glade
That's C++ but we're in the C channel
wild dawn
mmmh
that is the output
vale briar
shall we reconstruct the question?
do you really need to convert the double value to char array/char *?
OR
do you just want to print out the number?
sprintf()/snprintf() for
do you really need to convert the double value to char array/char *?
printf() for
do you just want to print out the number?
wild dawn
shall we reconstruct the question?
> do you really need to convert the double va...
i want to print the number on an OLED display on a nucleo64.
the given library provides a function that expects a string/char array. the library is c++ btw. it’s a bit confusing.
wild dawn
it is mainly C
and converting a double to an int is not specific to embedded devices. it is C
vale briar
not really. it depends on what libraries the embedded compiler have.
It may not have stdio or stdlib since those libraries may be too big for the system.
and I already given the answer (how you do it with std C library)
acoustic brambleBOT