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Converting a Long Long to a Char Buff
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Hello All,
I have been trying to convert a long long to a char buff and having problems.
I have tried spintf, and some casting but still can not get the conversion right.
Any help would be great!
Steve
I have been trying to convert a long long to a char buff and having problems.
I have tried spintf, and some casting but still can not get the conversion right.
Any help would be great!
Steve
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Join Date: Dec 2005
Posts: 5,850
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Post an attempt - and mention your OS/Compiler..
Well I am on Tandem Mainframe.
I have tried a few:
char buff[30];
long long lval;
memset(buf, 0, sizeof buf));
sprintf(buff, "%f", lval);
" %d "
" %u "
memcpy(buff, (char *)lval, sizeof(lval));
My std libs do not appear to have ltoa functions, juts atol, etc.
I have tried a few:
char buff[30];
long long lval;
memset(buf, 0, sizeof buf));
sprintf(buff, "%f", lval);
" %d "
" %u "
memcpy(buff, (char *)lval, sizeof(lval));
My std libs do not appear to have ltoa functions, juts atol, etc.
So your compiler supports long long, but no way to format it into a string? I find that hard to believe, did you check your compiler's documentation? At the very least there should be a non-standard function or extension that supports what you want.
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I tried functions as ltoa, itoa, etc and I took a look at my std libs and their is no ltoa conversion listes just the opposite.
I am dealing with a 64 bit value goinf to a array of chars and I do not see anything special for that.
short is support to but thier is no special call functions for it.
What calls do you suggest and I can look in my libs to see if they are there. This compiler is pretty old I think as I have found it missing other calls.
I am on contract here and not an employee.
I am dealing with a 64 bit value goinf to a array of chars and I do not see anything special for that.
short is support to but thier is no special call functions for it.
What calls do you suggest and I can look in my libs to see if they are there. This compiler is pretty old I think as I have found it missing other calls.
I am on contract here and not an employee.
>I am dealing with a 64 bit value goinf to a array of
>chars and I do not see anything special for that.
Don't just look at the headers, check the documentation. I'm reasonably sure that if the compiler supports long long, it provides a format specifier for sprintf as well.
>chars and I do not see anything special for that.
Don't just look at the headers, check the documentation. I'm reasonably sure that if the compiler supports long long, it provides a format specifier for sprintf as well.
New members chased away this month: 3
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Originally Posted by Narue 
>I am dealing with a 64 bit value goinf to a array of
>chars and I do not see anything special for that.
Don't just look at the headers, check the documentation. I'm reasonably sure that if the compiler supports long long, it provides a format specifier for sprintf as well.
I was just wondering if thier was a manual mathmatical way to do it?
Thanks Steve
>I was just wondering if thier was a manual mathmatical way to do it?
Well, long long is just another integer type, so converting it to a string is really no different from writing your own itoa function (or lltoa, as it were). If I were you[1], I would start looking for source code to itoa variations online (of which there are many). Chances are good you can change
[1] If I were me, which I am, I would write my own from scratch because I've done it before and have sufficient experience implementing libraries to trust my own skills over some random snippet I found on the web.
Well, long long is just another integer type, so converting it to a string is really no different from writing your own itoa function (or lltoa, as it were). If I were you[1], I would start looking for source code to itoa variations online (of which there are many). Chances are good you can change
int to long long and be ready to go. You might have to look out for range assumptions, but aside from that the conversion should be trivial.[1] If I were me, which I am, I would write my own from scratch because I've done it before and have sufficient experience implementing libraries to trust my own skills over some random snippet I found on the web.
New members chased away this month: 3
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Originally Posted by Narue
>I was just wondering if thier was a manual mathmatical way to do it?
Well, long long is just another integer type, so converting it to a string is really no different from writing your own itoa function (or lltoa, as it were). If I were you[1], I would start looking for source code to itoa variations online (of which there are many). Chances are good you can changeinttolong longand be ready to go. You might have to look out for range assumptions, but aside from that the conversion should be trivial.
[1] If I were me, which I am, I would write my own from scratch because I've done it before and have sufficient experience implementing libraries to trust my own skills over some random snippet I found on the web.
Thanks I will look for that and I may have to do some bit shifting that I was trying to avoid! It just seems it is all catered to go from ascii to int, long, etc.
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