Comparing a string (case sensitive)

**Waspntr** · 02-06-2003

I am trying to compare the string addPayType to all case sensitive possibilities. I have tried the strupr(), and a few other i have found on this board with 0% success rate. Here is my code snipit, Remember addPayType is string class. I did #include <string> and ctype.h in trying all the possiblilties found on this board. This is my first post so please forgive if im enter it incorrectly.

Code:

if(addPayType == "salary" || addPayType == "Salary" || addPayType == "SALARY")

**pode** · 02-06-2003

strcmp(); makes it alot easier to compare 2 strings

**~~master5001~~** · 02-06-2003

I think you want case insensitivity, first of all. You could do this:

Example

Code:

#include <cstring>

char temp[256];

std::strcpy(temp, addPayType.c_str());
std::strupr(temp);

if(std::strcmp(temp, "SALARY") == 0)  {
  // do stuff if temp equals "SALARY"
}

**Waspntr** · 02-06-2003

I accidentally posted new thread last time i trie to ask LOL

**Waspntr** · 02-06-2003

Yes master you are right i did intend for it to be case insensitive.

can anyone tell me if strcmp() is a case sensitive compare or not ?

**hk_mp5kpdw** · 02-06-2003

Direct from a book:

Code:

#include <string>
#include <iostream>
#include <algorithm>
using namespace std;

bool nocase_compare( char c1, char c2 )
{
    return toupper(c1) == toupper(c2);
}

int main()
{
    string s1("Hello");
    string s2("hElLo");

    if( s1.size() == s2.size() &&
        equal( s1.begin(), s1.end(), s2.begin(), nocase_compare) )
            cout << "The strings are equal." << endl;
    else cout << "The strings are not equal." << endl;

    return 0;
}

The size comparison in the "if" clause is needed otherwise two strings of unequal length will cause undefined behavior within the equal function. The equal function will go from the beginning of strings s1 and s2 through to the ends of the strings and apply the given nocase_compare function to each element. Haven't tested it but it looks OK. Hope this helps.

**Waspntr** · 02-06-2003

I went with the strcmp() option presented by master5001 and it works fine. this is what the snipit looks like now. Ty all

Code:

#include <cstring.h>

char temp[9];

                cin >> addPayType;

	strcpy(temp, addPayType.c_str());

	strupr(temp);

	if(strcmp(temp, "HOURLY") == 0)

                {

                         // do stuff;

                }

**Okiesmokie** · 02-06-2003

you dont need to use strupr(), there is a version of strcmp that is not CaSe SeNsAtIvE, its stricmp()

**Waspntr** · 02-06-2003

as advised earlier i tried strcmp() then after reading al ittle farther i noticed the strcmpi() and now i see stricmp(). Which is the correct ver, or are they both correct. I used strcmpi() and it works fine.

**Okiesmokie** · 02-06-2003

yea, my mistake, they are both correct

Thread: Comparing a string (case sensitive)

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Comparing a string (case sensitive)

Does strcmp() worry about the case of the letters in the string when comparing??

Thank you all for your help..

again i thank you for your help

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