Finding the ASCII value of a string?

If I define a string as

Code:

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char found[100];

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and then proceed to try

Code:

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if ((int) found[7]==80))
{
 printf ("%s",found);
}

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It should only occur if the seventh char in found is P, whose ascii value is 80, correct? Is there an easier way to do this?

Code:

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if(found[6] == 'P')
{
  printf("%s\n", found);
}

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Since 0 is included you would put [6] not [7] if you want to find the 7th letter

Thanks, that fixed the problem. I'm new to strings, so I should've checked that first...

Quote:

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Originally Posted by Nicheter

It should only occur if the seventh char in found is P, whose ascii value is 80, correct? Is there an easier way to do this?

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The ASCII code for 'P' is 80, but there is no guarantee that the system's character set is actually ASCII. It is better to compare explicitly with 'P' not just for clarity but because you do not necessarily know the character set. This of course assumes that the compiler is using the same character set as the platform, which is usually true.

Ah, well, that's a good tip, thanks. One other question, while I'm on the subject of strings. Is there any way to do multiple string comparisons in a shorter form than, for example,

Code:

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if((strcmp(str1,"apple")==0)||(strcmp(str1,"bananna")==0)||(strcmp(str1,"fruit")==0)||...

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and so on.

You could have an array of strings, e.g.

Code:

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const char *fruits[]= { "apple", "banana", "pear", ... } ;

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and then loop through that array to see if you find it.

--
Mats

Well you don't need so much "(" and ")"

Code:

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if(strcmp(str1,"apple")==0 || strcmp(str1,"bananna")==0 || strcmp(str1,"fruit")==0)

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Code:

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int bFound = 0;
bFound = (strcmp(str1,"apple")==0);
if(!bFound)
    bFound = (strcmp(str1,"bananna")==0);
if(!bFound)
    bFound = (strcmp(str1,"fruit")==0);
...

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for example

Thanks guys, but Vart, isn't your solution even longer then the initial example?

Quote:

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Originally Posted by Nicheter

Thanks guys, but Vart, isn't your solution even longer then the initial example?

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Strings are short - so IMHO code is more readable...
It takes alittle more lines... so what? Put this code into another function, add loop and array as suggested by matsp... but do not write lines longer than the screen width

matsp's suggestion is probably best, especially if you have over, say, five strings. It's pretty easy to do, too.

Code:

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/*! Returns true if \a needle is a fruit.
    \param a The string that might represent a fruit.
    \return True (nonzero) if \a needle is a fruit.
*/
int match(const char *needle) {
    const char *haystack[] = {
        "apple", "banana", "pear", /* ... */
    }
    size_t x;

    for(x = 0; x < sizeof(haystack) / sizeof(*haystack); x ++) {
        if(!strcmp(needle, haystack[x])) return 1;
    }

    return 0;
}

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Plus, if you get a lot of strings, you can sort them and use a binary search instead of a linear search quite easily.

Well, thanks! One final, unrelated, question:
if i use my main statement as

Code:

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int main(int argc, char *argv[])

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it allows me to take command line arguments, and works fine. But if, using windows, I try to drop a file onto the program so as to make that the second argument, it does not work properly? Well, that is to say, it executes with no errors, but the outputted file is nowhere to be found...

Quote:

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Originally Posted by Nicheter

Well, that is to say, it executes with no errors, but the outputted file is nowhere to be found...

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Nowhere to be found, or "not where you expect it"?

--
Mats

it outputs a file 'reformatted.txt' and a search of the entirety of the computer turns up nothing. After checking the program's execution one more time, it does seem to be executing properly, just the file isn't appearing where it should/at all? I thought it may have been someplace else, but apparently this is not the case.

Quote:

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Originally Posted by Nicheter

it outputs a file 'reformatted.txt' and a search of the entirety of the computer turns up nothing. After checking the program's execution one more time, it does seem to be executing properly, just the file isn't appearing where it should/at all?

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Can you post the code?

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Mats