How to effectively assign numerical string values to integers?

Question

I have a string containing a value of time in HH:MM:SS(':' are a part of the string.) format.I have to convert the time into seconds and give that value to an integer variable.I am not aware of any function that can help me do it.

check this link http://stackoverflow.com/questions/4137748/c-converting-a-time-string-to-seconds-from-the-epoch and http://www.cplusplus.com/reference/ctime/strftime/ — Charles Stevens, Jan 09 '14 at 08:33
http://stackoverflow.com/questions/11213326/how-to-convert-a-string-variable-containing-time-to-time-t-type-in-c This answers your question — Nazar554, Jan 09 '14 at 08:34

score 1 · Accepted Answer · answered Jan 09 '14 at 08:47

1

Use sscanf_s. For example:

void ScanTime(char* strTime)
{
    int hours;
    int minutes;
    int seconds;

    sscanf_s(strTime, "%d:%d:%d", &hours, &minutes, &seconds);

    printf("hours: %d\nminutes:%d\nseconds:%d\n", hours, minutes, seconds);
}


int _tmain(int argc, _TCHAR* argv[])
{
    ScanTime("13:57:44");
    return 0;
}

answered Jan 09 '14 at 08:47

Uri Y

840
5
13

It's correct, but the real question was how to get the total seconds... – Cees Meijer Jan 10 '14 at 21:42
That's easy: `int totalSeconds = seconds + minutes*60 + hours*3600;` – Uri Y Jan 11 '14 at 13:13

Vijay · Answer 2 · 2014-01-09T08:46:16.220

0

Use strtol. for example::

int a=(int)strtol(numeric_string.c_str(),(char **)NULL,10);

if your intension isto simply convert HH:MM:SS, you need to write a function algorithm would be like(assuming 24Hr format):

split the string using ":"
Convert each part using strtol to integer.
last part+(60* middle part)+(60*60*firstpart) will give you the actual value

edited Jan 09 '14 at 08:46

answered Jan 09 '14 at 08:36

Vijay

65,327
90
227
319

What does "for eg" mean? – Kerrek SB Jan 09 '14 at 08:37

score 0 · Answer 3 · answered Jan 09 '14 at 08:40

Since this is not a standard C++ function it greatly depends on what framework or library you are using.

This how it's done in Borland C++ Builder:

String Time;
Time = "12:34:56";
TDateTime DT;

try{
    DT = StrToTime(Time);
  }catch(...){String M = "Error converting time string: "+Time; Application->MessageBox(M.c_str(),"ERROR",MB_OK );}

How to effectively assign numerical string values to integers?

3 Answers3