C inputing Fractions

[chazzy69]

Hi, im just trying to figure out a fairly simple way to input fractions into my program, they have to be in the format of 7/2.

I thought that mabey i could scan the string and then split it at slash (/) while keeping the slash.

In mabey a sort of array, i know this possible in vb but not sure how to achieve this or anyother method in C.

Any help with either my idea or any other method for inputting a fraction is greatly appreciated,

Thanks

[gpraghuram]

Hi, im just trying to figure out a fairly simple way to input fractions into my program, they have to be in the format of 7/2.

I thought that mabey i could scan the string and then split it at slash (/) while keeping the slash.

In mabey a sort of array, i know this possible in vb but not sure how to achieve this or anyother method in C.

Any help with either my idea or any other method for inputting a fraction is greatly appreciated,

Thanks

use fgets to get the input string.
Then use strtok to split the string using / as the token to get the strings

Raghuram

[chazzy69]

Thanks ill give it a go

[chazzy69]

I tried your idea but used scanf instead of fgets, that work ok but when i tried splitting up the string i kept running into errors and when i didn't get any the program would crash.

Could you possible give a code example of the strtok function in use

Thanks for help is greatly apprecaited

[Savage]

I tried your idea but used scanf instead of fgets, that work ok but when i tried splitting up the string i kept running into errors and when i didn't get any the program would crash.

Could you possible give a code example of the strtok function in use

Thanks for help is greatly apprecaited

strtok reference



Savage

[chazzy69]

Yes i tried the code given in that example i.e.


from http://www.cplusplus.c om/reference/clibrary/cstring/strtok.html

int main ()
{
  char str[] ="- This, a sample string.";
  char * pch;
  printf ("Splitting string \"%s\" into tokens:\n",str);
  pch = strtok (str," ,.-");
  while (pch != NULL)
  {
    printf ("%s\n",pch);
    pch = strtok (NULL, " ,.-");
  }
  return 0;
}

That worked but see i am not just trying to ouput the different tokens as soon as their split but rather use them else where in the code.

What the major problems is for me is how to assign each part of the token to another string or integer, etc.

Thanks for the help

[Savage]

Yes i tried the code given in that example i.e.


from http://www.cplusplus.c om/reference/clibrary/cstring/strtok.html

int main ()
{
  char str[] ="- This, a sample string.";
  char * pch;
  printf ("Splitting string \"%s\" into tokens:\n",str);
  pch = strtok (str," ,.-");
  while (pch != NULL)
  {
    printf ("%s\n",pch);
    pch = strtok (NULL, " ,.-");
  }
  return 0;
}

That worked but see i am not just trying to ouput the different tokens as soon as their split but rather use them else where in the code.

What the major problems is for me is how to assign each part of the token to another string or integer, etc.

Thanks for the help

In this example pch will contain your desired parts of string,so if you want to convert them to a integer all you have to do is call atoi function.If you want to store it like strings then you need array of strings.E.g

[CODE=c]char strings[10][80];

strcpy(strings[0],strtok(str," ,."));
for(int i=1;i<10&&(pch= strtok(NULL," ,."))!=NULL;i++ )
{
strcpy(strings[i],pch);
}[/CODE]

[chazzy69]

Thank you heaps it works a treat!!!