Thread: strcpy - cannot convert

instead u can use sscanf. Here u go the sample code

Code:

#include<stdio.h>

int main()
{
    char str[]="123";
    int num;
    
    sscanf(str,"%d", &num);
    
    printf("The num is %d\n", num);
    
    getchar();
    return 0;
}
/* my output
The num is 123
*/

ssharish2005

hello everyone,

Im also new to this programming language. Please, forgive me if I say something wrong.
Actually the person want to display the time taken between two destinations, so he has to manuplate the data .i.e. by some mathematical operation then, how one can use character datatype, one must go with integer or float etc.
Am I wrong in thinking like this?

Hey guys,

Yeah - I am trying to get the time taken between destination and arrival but think I may have been going about it the total wrong way ?

I was trying to get the user to enter the times and these would be stored in a string for output later in a report to screen if you user wishes. With these being stored in a string, I then wanted to calculate the difference and then get that into a seperate string for reporting later too. Does that make sense ?

Sorry for replying back to this so late, but been away at a family get together.

Thanks

H_M

Hi vart,

Thank you for your reply.

That sounds pretty good - how would I go about doing that ? I'm not sure how I could do that.

Any help will be greatly appreciated.

Thanks

H_M

Originally Posted by vart

Doing what? converting string to int?
calculating time based on hours, minutes, secs?
formating the time difference back to string?

Code:

char hours[] = "10";
char minutes[] ="15";
char sec[] = "45";
char* dummy; //is set to the point where the conversion is stopped can be use for parsing long strings
long l_hours = strtol(hours,&dummy,10);
long l_minutes = l_hours* 60 + strtol(minutes, &dummy,10);
long l_secs = l_minutes*60 + strtol(sec, &dummy,10);

Hi vart,

Thanks very much for your input on this subject. Yes, I do wish to do all the above, converting, calculating and then format it back into a string. I am not using seconds though, don't need them for what I was working on - do I need to use them ?

Also, can I use that example of code when I have the hours and minutes in a string ? I have it so the user would be prompted and would enter like following:

Departure Hour : 15
Departure Mins : 30
Arrival Hour : 17
Arrival Mins : 00

And after these have been entered, the program should calculate that it has taken 1 hr 30 mins to deliver the load and store that in a string (even seperate ones for the hours and minutes again if need be)

Does that make any sense !? Sorry if it's rather vague! My apologies for lateness in replying but I have been trying to work on it again tonight and now it's late and I need to get ready for bed.

Any help will be greatly appreciated.

Thanks

H_M

Still can't get it to work - anyone any ideas on the above ?

Thinking of stopping this one and starting another one as I can't get this working, would hate to do that though !

Thanks

H_M

Hi Vart,

Many thanks for your reply.

Well, it prompts for the data to be entered ok and I can enter it but it's after that part that I'm having trouble trying to calculate it. Does it need to save the data before it calculates it ?

I even tried a 'do, while' type of loop (is that the correct term?), but still couldn't get it to work - that failed with far too many errors to list !

Thanks, and sorry if I'm sounding stupid!

H_M