Questions about itoa function may have this tag. Despite being supported by some compilers, this function is not defined in ANSI-C and it is not part of C++.
Questions tagged [itoa]
94 questions
4
votes
1 answer
Issue with itoa() and char array in regards to C (interfacing an LCD)
Doing my best to be brief; I am trying to program an LCD to print out an integer variable (of more than 1 digit). I'm trying to do this using the itoa function as the LCD takes ASCII characters. The below code compiles and prints "Set Temp: " when I…
James
- 356
- 2
- 13
4
votes
1 answer
ANSI C, integer to string without variadic functions
I'm currently working with a PLC that supports ANSI C, but uses its own flavour of the GNU compiler, which doesn't compile any variadic functions and things like itoa. So using sprintf & co. isn't an option for converting integers to strings. Can…
Maxwin
- 383
- 3
- 17
4
votes
2 answers
Unsigned int into a char array. Alternative to itoa?
I have a question about unsigned ints.
I would like to convert my unsigned int into a char array. For that I use itoa. The problem is that itoa works properly with ints, but not with unsigned int (the unsigned int is treaded as a normal int).
How…
Ganjira
- 966
- 5
- 16
- 32
3
votes
4 answers
Converting integer to binary string using itoa in C/C++
Can I use itoa() for converting long long int to a binary string?
I have seen various examples for conversion of int to binary using itoa. Is there a risk of overflow or perhaps loss of precision, if I use long long int?
Edit
Thanks all of you for…
Mayank Kataria
- 33
- 1
- 1
- 5
3
votes
1 answer
convert int to char* in standard C (without itoa)
I have declared and initialized two variables as shown below:
int a=5;
char* str;
str = (char*)calloc(255, sizeof(char));
I want to convert the int to char* in standard C. I cannot use any conversion function from C++ such itoa.
I am using Ubuntu…
Alexandru N. Onea
- 423
- 2
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- 18
3
votes
2 answers
Convert usigned integer( uint16_t) to string. Standard itoa base 10 is giving negative values
I need to convert uint16_t value to a string. I want the string to be a decimal respresentation of the number.
Example: uint16_t i=256 string: 256
I tried with itoa(i,string, 10) but when i value increases starts printing negative values.
I send the…
user3278790
- 75
- 1
- 3
- 9
3
votes
4 answers
Can I reuse the same buffer for subsequent itoa() calls?
I'm wondering if this is safe/sanctioned usage:
char pBuf[10];
itoa(iInt, pBuf, 10);
// pBuf value gets copied elsewhere
//memset(pBuf, 0, sizeof(pBuf)); // Is this necessary?
itoa(iInt2, pBuf, 10);
// pBuf value gets copied elsewhere
Can I reuse…
Enigma
- 1,247
- 3
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- 51
2
votes
1 answer
simulate ulltoa() with a radix/base of 36
I need to convert an unsigned 64-bit integer into a string. That is in Base 36, or characters 0-Z. ulltoa does not exist in the Linux manpages. But sprintf DOES. How do I use sprintf to achieve the desired result? i.e. what formatting % stuff?
Or if…
unixman83
- 9,421
- 10
- 68
- 102
2
votes
4 answers
uint64_t to an array - C language
I tried to parse uint64_t array to an array of char (result in decimal, separated by comma).
I used memcpy, every time I get a random values. iota() function converts max uint32_t values. I tried separate uint64_t to 2 uint32_t, but I never get a…
maghost
- 39
- 1
- 7
2
votes
2 answers
How do I fix my `itoa` implementation so it doesn't print reversed output?
I want to convert an integer into a string of numeric characters in C.
I've tried using itoa, but it's non-standard and not provided by my C library.
I tried to implement my own itoa, but it's not working properly:
#include
#include…
S.S. Anne
- 15,171
- 8
- 38
- 76
2
votes
2 answers
Trying to understand itoa function
I tried to re-write the itoa() function from K&R exercises, but I failed to define it. I see the answer of the function in the library , but I can't understand what is inside the do block. Please explain it to me. Thanks!
/* itoa: convert n to…
mohamed tarek
- 125
- 7
2
votes
3 answers
Formatting: how to convert 1 to “01”, 2 to “02”, 3 to "03", and so on
Following code outputs the values in time format, i.e. if it's 1:50pm and 8 seconds, it would output it as 01:50:08
cout << "time remaining: %02d::%02d::%02" << hr << mins << secs;
But what I want to do is (a) convert these ints to char/string (b)…
Daqs
- 720
- 3
- 8
- 28
2
votes
1 answer
VBScript to convert integer to string (itoa)
I have written a method to take an integer and convert it to either decimal, hex, or binary depending on what you choose using commenting. I will build a choice in later. The problem I am having is that the wrong values are being chosen and I think…
BDMurphy
- 23
- 5
2
votes
4 answers
Base Conversion Problem
I'm trying to convert an integer to a string right now, and I'm having a problem.
I've gotten the code written and working for the most part, but it has a small flaw when carrying to the next place. It's hard to describe, so I'll give you an…
jakogut
- 4,409
- 6
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- 41
2
votes
5 answers
guide me in dividing the number by 10 and later converting into a string
#include
int main()
{
int num = 255;
num = num / 10;
char buf[5];
itoa(num, buf,10);
printf("%s", buf);
return 0.
}
I am trying to divide the integer number by 10 but I am getting a solution of 25 ( I should get 25.5). Later I am…
suhas sjbit
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