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.NET Forum / Languages / Managed C++ / January 2007Is the first character in a string a letter?
There must be an easier way then what I'm doing to determine if the first character in a string is a valid letter. My code is getting to big. There must be a better way. Thanks in advance > There must be an easier way then what I'm doing to determine if the first > character in a string is a valid letter. > > My code is getting to big. There must be a better way. Anything wrong with isalpha(s[0]) ? Brian The only thing wrong with it is that I couldn't find it thanks >> There must be an easier way then what I'm doing to determine if the first >> character in a string is a valid letter. [quoted text clipped - 4 lines] > > Brian > The only thing wrong with it is that I couldn't find it > > thanks Couldn't find it? Have you heard of Google by any chance? http://msdn2.microsoft.com/en-us/library/xt82b8z8(VS.80).aspx Brian I'm constantly on it Knowing the correct thing to search for is the trick to not getting 10 million hits >> The only thing wrong with it is that I couldn't find it >> [quoted text clipped - 5 lines] > > Brian While I was at it I should have asked you about trimming a string of leading white space. Is there a easy way? I've been searching the doc and the internet but can't find anything. Thanks again >> There must be an easier way then what I'm doing to determine if the first >> character in a string is a valid letter. [quoted text clipped - 4 lines] > > Brian I found something to try > While I was at it I should have asked you about trimming a string of > leading white space. [quoted text clipped - 13 lines] >> >> Brian > While I was at it I should have asked you about trimming a string of leading > white space. > > Is there a easy way? > > I've been searching the doc and the internet but can't find anything. Frank: If you are using CString then there is TrimLeft(). David Wilkinson I'm doing plain C Can you see what is wrong with the while statement ComboBox_GetText(GetDlgItem( hDlg, IDC_N_USERNAME), szTmpStr, SIZE_OF_USER_NAME); strcpy_s(szTmpStr2,72,szTmpStr); strcat_s(szTmpStr2,72, "5"); //Make sure the strip code that follows leaves something while (iswspace(*szTmpStr2)) szTmpStr2++; //Error 1 error C2105: '++' needs l-value if( !isalpha(szTmpStr2[0])) //check the first character Thanks for the reply >> While I was at it I should have asked you about trimming a string of >> leading white space. [quoted text clipped - 8 lines] > > David Wilkinson > I'm doing plain C > Can you see what is wrong with the while statement [quoted text clipped - 8 lines] > while (iswspace(*szTmpStr2)) szTmpStr2++; //Error 1 error C2105: '++' > needs l-value char *p = szTmpStr2; while (iswspace(*p)) p++; I should have given you one more line of code ComboBox_GetText(GetDlgItem( hDlg, IDC_N_USERNAME), szTmpStr, SIZE_OF_USER_NAME); strcpy_s(szTmpStr2,72,szTmpStr); strcat_s(szTmpStr2,72, "5"); //Make sure the strip code that follows leaves something while (isspace(*szTmpStr2)) szTmpStr2++; //Error 1 error C2105: '++' needs l-value if( !isalpha(szTmpStr2[0])) >> I'm doing plain C >> Can you see what is wrong with the while statement [quoted text clipped - 11 lines] > char *p = szTmpStr2; > while (iswspace(*p)) p++; >strcpy_s(szTmpStr2,72,szTmpStr); >strcat_s(szTmpStr2,72, "5"); //Make sure the strip code that follows leaves >something >while (isspace(*szTmpStr2)) szTmpStr2++; //Error 1 error C2105: '++' needs >l-value Make a pointer, then ++ it. For example: char* pStart = &szTempStr2[0]; while(isSpace(*pStart)) ++pStart; At the end, pStart is a pointer to some memory (WITHIN szTempStr2) that has the string minus any leading spaces. Copy that off to another buffer if you want. Nathan Mates -- <*> Nathan Mates - personal webpage http://www.visi.com/~nathan/ # Programmer at Pandemic Studios -- http://www.pandemicstudios.com/ # NOT speaking for Pandemic Studios. "Care not what the neighbors # think. What are the facts, and to how many decimal places?" -R.A. Heinlein Thanks >>strcpy_s(szTmpStr2,72,szTmpStr); >>strcat_s(szTmpStr2,72, "5"); //Make sure the strip code that follows [quoted text clipped - 19 lines] > # think. What are the facts, and to how many decimal places?" -R.A. > Heinlein
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