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Re: Help with atoi 13 Years Ago by abhimanipal atoi is used with string and not chars. [URL="http://www.cplusplus.com/reference/clibrary/cstdlib/atoi/"]This[/URL] link explain the function along with some sample code just google for malloc/ calloc you will find tons of documentation and examples Re: Handeling errors with atoi() 12 Years Ago by Trentacle atoi() has no way to recover from errors. Use strtol() as subith86 suggested. Should you actually want to test whether a character is a digit, don't perform contortions; #include <ctype.h> and use isdigit instead. Re: Hello Everyone, I need Help with my C++ Code... 19 Years Ago by britt_boy … lines inDay1Int=atoi(inDay1); inYear1Int=atoi(inYear1); inDay2Int=atoi(inDay2); inYear2Int=atoi(inYear2); should be inDay1Int=atoi(inDay1.c_str()); inYear1Int=atoi(inYear1.c_Str()); inDay2Int=atoi(inDay2.c_str… Re: Calling c functions in x86_64 assembly, nasm 10 Years Ago by Ancient Dragon atoi() does not write to a buffer that you created like fgets() so that's probably why atoi(( works and fgets() doesn't. Re: Command Line Arguments with integers 9 Years Ago by deceptikon `atoi` invokes undefined behavior if the converted integer cannot be represented by the `int` type. There's no workaround other than explicitly validating the string before calling `atoi`, and since `strtol` does this already (as well as not invoking undefined behavior in the same case `atoi` does), there's no good reason to use `atoi`. Re: Simple coversion program hanging on input 12 Years Ago by zeroliken atoi is used to convert a [B]string[/B] to an integer Quick question: why use atoi() on an integer? Re: Convert string to int 10 Years Ago by Labdabeta atoi does indeed only work with cstrings, however you can convert an std::string to a cstring using .c_str(). So for your example I would guess that the solution is: totalMins += atoi(MovieRecord->getMinutes().c_str()); Re: Problem with struct i think 16 Years Ago by Salem atoi() expects a pointer to a char array, containing a \0 char at some point? A single char doesn't work. [ICODE] IntArr[Pot10] = c - '0';[/ICODE] Re: Convert vector<string> to vector<double> 14 Years Ago by Salem atoi is a C function expecting a char* Perhaps you need to implement a small conversion function which accepts a std::string instead. Re: help on 'Segmentation Fault' 18 Years Ago by Rashakil Fol atoi expects a pointer to a nul-terminated array of characters, … Re: Coverting varibles 18 Years Ago by prog-bman atoi for converting a char * to an int C or Or stringstreams for C++ Re: value to digits 18 Years Ago by Lerner atoi() converts a null terminated char array into an integer value (… Re: high digit numbers 15 Years Ago by Gel atoi( char to int) or itoa ( int to char) Re: Need Help with conversion 14 Years Ago by s_sridhar atoi function might be helpful Re: question about string element 14 Years Ago by NeoKyrgyz atoi("0"); (int ) text[0]-48 Re: How concatenate number in C++ 11 Years Ago by IndianaRonaldo > > atoi() is simpler than (x1*10) + x2? How do you figure that? Please explain... > > And itoa() is not generally available (see portability). > Or did you mean Illinois Tactical Officers Association? :-P Well, for a start, it works only for single digit numbers. The method of multiplying by 10, I mean. Re: how to convert ascii string to decimal integer 11 Years Ago by deceptikon atoi() should work. Note that the problem here is not converting … Re: Atoi help 8 Years Ago by deceptikon You've found one problem with `atoi`. Please read [this](https://www.daniweb.com/software-development/c/threads/465515/tribal-knowledge-atoi-is-evil) for more. Atoi help 8 Years Ago by COKEDUDE If you carefully look at this example you will see with atoi when it runs into a string it gives the integer value of 0. So I was wondering how you tell the difference between the integer value of 0 and a string that got converted to 0. http://www.tutorialspoint.com/c_standard_library/c_function_atoi.htm Re: Atoi help 8 Years Ago by gusano79 You can't tell from return value from `atoi` alone. If it returns `0`, it's easy enough to check if the string itself is actually `"0"` (*i.e.*, `'0'` followed by `'\0'`). atoi(string.substr(x,x)) Possible? 16 Years Ago by alcoheca … "; cin >> dob; if (atoi(dob.c_str())) break; } while (!atoi(dob.c_str())); temp = dob.substr(0,2); cout…temp; // Sanity check person.dob.d = atoi(temp.c_str()); //person.dob.m = atoi(dob.substr(2,3)); Doesn't work :…;::_Myt' to 'const char *' //person.dob.y = atoi(dob.substr(4,7)); return person; }[/CODE] Re: atoi(string.substr(x,x)) Possible? 16 Years Ago by Nick Evan [QUOTE][CODE=c]atoi(dob.c_str())[/CODE][/QUOTE] That's one way to do it. I would do it like this: [CODE=c]istringstream convert(dob); int intDob =0; convert >> intDob[/CODE] And voila: string dob is now saved as an int in intDob! Re: atoi(string.substr(x,x)) Possible? 16 Years Ago by alcoheca I'm stupid, and can see how to do it, atoi(dob.substr(2,3).c_str()); sorry everyone ! :-) Atoi and StringStream 13 Years Ago by gregarion …guys , i haing a problem with using stringstream and atoi . I am trying to conert a string to in… ss (d); ss >> b ; [/CODE] When using atoi [CODE] string d = "033116"; int b = 0;… b = atoi(d.c_str(); [/CODE] For some reason , when i cout my… atoi function 16 Years Ago by smiles … number "12....." to an int, I am using atoi() (I don't sure, I declare my array[] type int…') // press Enter key to exit function { number[iNum]='\0'; numResult=atoi(number); return numResult; } } while(1); } [/CODE] Thanks :) atoi() not giving correct answer 13 Years Ago by iqra123 hii i m using atoi() to convert char value to int. and then passing that …)); printf("%s", &recv_data); fflush(stdout); int i=atoi(recv_data); // converting recv_data into integer switch(i) { case 1: systm_time… Re: atoi() not giving correct answer 13 Years Ago by nbaztec [QUOTE]atoi() not giving correct answer[/QUOTE] This has nothing to do with your [B]no_of_process ()[/B] returning 0. Tribal Knowledge: atoi is evil! 10 Years Ago by deceptikon …sizeof buf, stdin) != NULL) { int value = atoi(buf); printf("%d\t%lld\t%lld\n"… = '\0'; if (is_valid_int(buf)) { int value = atoi(buf); printf("%d\t%lld\t%lld\n"…boundary value. Hopefully this article explained why `atoi` is to be avoided and how to … Re: Tribal Knowledge: atoi is evil! 10 Years Ago by mike_2000_17 … incompatibility with the implementation of `strtol` and `atoi`. And so, I checked the GNU GCC's… library, and here is what I found: __extern_inline int __NTH (atoi (const char *__nptr)) { return (int) strtol (__nptr, …` instead. But I would guess all implementations of `atoi` are just forwarding to `strtol` anyways. In other… Help with atoi 16 Years Ago by c++ prog …c[i] ; num[i] = atoi(&temp) ; } cout <&…num2[e] = atoi(&temp2) ; } int total = atoi(c) + atoi(d) ; cout…