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
2
votes
2 answers
What is the technical reason this _itoa_s fails?
I'm trying to convert the digit's 0 to 9 to ASCII using _itoa_s and I find myself running into stack corruption errors using MSVC2012.
I thought that the ASCII table only occupied one byte per character, but from the looks of things, one byte isn't…
Tony The Lion
- 61,704
- 67
- 242
- 415
1
vote
1 answer
Itoa stopping strcat from properly appending
I am trying to append a series of char arrays in Arduino C++. I have a char array "outputString", and a series of other char arrays that I with to append with via strcat. I also have a checkSum generator that generates the checksum and I used Itoa…
HFOrangefish
- 267
- 1
- 10
1
vote
1 answer
How to write a variadic function in C that takes integers and returns them all together in a dynamic string?
For example:
char* function(int n, ...); //prototype
main()
{
char* s;
s= function(3, 123, 456, 789);
printf("%s", s);
}
How do i write this function that will take integers and return a dynamic string of these integers? While trying to solve…
savara7
- 33
- 4
1
vote
1 answer
Atoi() vulnerability against fault injection
I’m using atoi to convert an string to integer in a embedded c application. However, I could exploit the vulnerability in atoi() using clock glitching fault injection attack. I mean when I have a single or multiple glitch, the processor missed some…
elik1991
- 73
- 1
- 8
1
vote
1 answer
Segfault when trying to recode itoa in C
Newbie trying to recode itoa here.
I am not quite sure about how the itoa function works, but here's how I want mine to work for now :
char *ft_itoa(int nb, char *str)
I want each digit of nb to be converted into a char which is to be put in…
badakzz
- 35
- 6
1
vote
0 answers
Is there a replacement for '_itoa_s' function in C++
Found this old source for a autoclicker, I wanted to edit and tweak a few strings, so it would be a bit easier for accessibility reasons.
https://gist.github.com/iGlitch/c55043119fce86e7bf04efc3aae1b5bf
But just trying to compile the code as it is,…
Koppis
- 109
- 8
1
vote
4 answers
Why does itoa expect a signed character instead of an unsigned?
Learning embedded C while working in MPLAB X with a PIC24FJ128GB204.
So far, I've mostly heard that you should use unsigned types as much as possible (especially?) on embedded devices, so I've started to use uint8_t arrays to hold strings. However,…
Dieter Vansteenwegen ON4DD
- 284
- 3
- 15
1
vote
3 answers
converting integer to string C++
I am trying to convert an integer to char array and I came across this piece of code
int i = 5;
std::string s;
std::stringstream out;
out << i;
s = out.str();
But when I try to print the value of s it still prints 5. I don't know if its supposed to…
Max Eastman
- 33
- 2
- 4
1
vote
1 answer
Does itoa delete char?
Why does this give me a memory error?
char* aVar= new char;
itoa(2, aVar, 10);
delete aVar;
Does itoa delete the aVar? How to know if a C++ function deletes the pointer, is there a convention about that?
If I do this then error doesn't occur:
char*…
okami
- 2,093
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1
vote
2 answers
C int to char array on Mac OS X
I'm trying to convert an int to a char*. I'm on a Mac OS X so I can't use itoa, since it's non-standard, I'm trying to use sprintf or snprintf but I keep on getting segmentation fault: 11.
Here's what I've got:
snprintf(msg, sizeof(char *), "%d",…
C. Porto
- 631
- 3
- 12
- 26
1
vote
1 answer
itoa using reverse(string) code showing error
Why doesn't ANSI C use strrev instead of creating such a big reverse function?
This code is showing me an error. Please correct it. What is the error. I am using Code::Blocks
Error message that I…
user3754207
1
vote
2 answers
How to add an multidigit int and a char, where the output will be int + char
this is what I have so far
Header file reads:
string MyAdd(int A, char B)
{
char C[10];
itoa(A,C,10);
C[1] = '+';
C[2] = B;
C[3] = '\0';
return C;
}
Calling program:
cout << "\n\t\tThe…
user3185727
- 159
- 1
- 3
- 12
1
vote
4 answers
itoa recursively
I have been trying to write a recursive version of function itoa, the code is shown below.
void itoa(int n, char s[])
{
static int i = 0;
if(n / 10 != 0)
itoa(n/10, s);
else if(n < 0)
i = 1; /* s[0] is allready…
Tool
- 12,126
- 15
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- 120
1
vote
1 answer
Converting uint16 from ADC flips negative
What I want to do:
Turn the resulting 16bit number (after combining the two 8bit #s) into a string to use with my serial send function
The problem:
When using itoa, the result becomes negative once it passes the half way point (passing from the 15th…
Nick Yang
- 13
- 2
1
vote
2 answers
Reversing a string with strrev - C
I'm trying to reverse a string using the function strrev(). I know that strrev returns a pointer to the reversed string so I simply initialize an already allocated string with same size as the original one with the strrev function return. Obviously…
Arlind
- 436
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