Search DaniWeb - strlen

strlen 14 Years Ago by hystaspes …; size_t sizeOfText; }; // Define the constructor. String::String( char *ch ) { sizeOfText = strlen( ch ) + 1; // Dynamically allocate the correct amount of memory. _text… be one unit more than "ch"? [CODE] sizeOfText = strlen( ch ) + 1; _text = new char[ sizeOfText ]; strcpy_s( _text, sizeOfText, ch… strlen 15 Years Ago by buzzykerbox …)time(NULL)); num = rand() % 9 + 0; word_to_guess = words[num]; size = strlen(word_to_guess); [/CODE] Re: strlen 15 Years Ago by Fbody …; post, but I thought I should clarify daviddoria's response. strlen() only works with C-style strings (null-terminated arrays of… Re: strlen behaving strangley ?? 15 Years Ago by duggydiggy … alright in VS ,will call my strlen . But on top of gcc , my strlen function is not called...instead by default… is that? because when I look into symbol table strlen is resolved statically To be more specific I am pasting…[b]0000006e g F .text 0000002f strlen[/b] [/code] Above strlen(which is my strlen) is bounded with an known offset so… strlen of strdup 15 Years Ago by monkey_king … depends on uninitialised value(s) ==25636== at 0x4C26D29: strlen (mc_replace_strmem.c:242) ==25636== by 0x40060A: main (…test.c:7) [/CODE] [*]Question Strlen doesnt apparantly tell you how much space you have in… printf("length of str1:%d\n",(int)strlen(str1)); str1 = "test_of_string\n"; printf… Strlen help needed. Got some questions to ask ^ ^ 16 Years Ago by dexter1984 …stats.getline(counter,200); for (int i=0; i<strlen(counter); i++) { if (isupper(counter[i])) upper++; if…assignment but I'm still confused about the strlen command. Above is the section of code …though. When i tried using [QUOTE]total = strlen(counter)[/QUOTE] The result is not what I want… strlen behaving strangley ?? 15 Years Ago by duggydiggy …stdio.h> #include <conio.h> int strlen(const char *); int main() { char str[]="rahul&…quot;; printf("%d",strlen(str)); _getch(); return 0; } int strlen(const char *str) { const char… Length:6 //correct If I edit the strlen function as [CODE] int strlen(const char *str) { const char *… Re: strlen behaving strangley ?? 15 Years Ago by duggydiggy …* 000001b9 __libc_start_main@@GLIBC_2.0 [B]08048442 g F .text 0000002c strlen[/B] 08048544 g O .rodata 00000004 _IO_stdin_used 0804a00c g .data… 00000000 _init [/code] looks to me like static linking of strlen but standard libraries are resolved dynamically. Please if one can… Re: strlen of strdup 15 Years Ago by Salem …, then you try and "read" that memory (using strlen) to find a \0 Besides which, it's also a… my new array also hold 80 or just till the strlen of the old char array? Minimally, just the space needed… tell that has happened, as all you officially have is strlen()+1 bytes. Re: strlen behaving strangley ?? 15 Years Ago by gerard4143 … interesting [CODE] #include <stdio.h> size_t strlen(const char *s); int ans = 0; int main(int… argc, char**argv) { return ans = strlen("gerard"); } size_t strlen(const char *s) { int i = 0; while… the object dump...The compiler is calculating the strlen an placing the value directly into my global … Re: strlen behaving strangley ?? 15 Years Ago by gerard4143 …function call [CODE] #include <stdio.h> size_t strlen(const char *s); int ans = 0; int main(int…gt;", stdout); fgets(ch, 19, stdin); return ans = strlen(ch); } size_t strlen(const char *s) { int i = 0; while (*s…thing at work...Shouldn't it return the normal strlen result instead of the one I defined here...It… Re: strlen behaving strangley ?? 15 Years Ago by gerard4143 … <stdio.h> typedef size_t(*pfunc)(const char*); size_t strlen(const char *s); int ans = 0; int main(int argc…, char**argv) { pfunc tfunc = (pfunc)strlen; return ans = tfunc("gerard"); } size_t strlen(const char *s) { int i = 0; while… Re: strlen behaving strangley ?? 15 Years Ago by gerard4143 … the function call [CODE] #include <stdio.h> size_t strlen(const char *s); int ans = 0; int main(int argc…->", stdout); fgets(ch, 19, stdin); return ans = strlen(ch); } size_t strlen(const char *s) { int i = 0; while (*s++) ++i… Re: strlen behaving strangley ?? 15 Years Ago by gerard4143 …=duggydiggy;998236]Tell me how can a compiler calculate the strlen if it does not know what the string is.You… value and is this so hard to conceive - we use strlen all the time maybe they(gcc) decide to allow optimization… len of a string - so when we substitute our own strlen function(one that doesn't return a standard string length… Re: strlen behaving strangley ?? 15 Years Ago by duggydiggy …,,linking.. where compiler can assume only. [QUOTE] we use strlen all the time maybe they(gcc) decide to allow optimization…of a string - so when we substitute our own strlen function(one that doesn't return a standard string …criteria to decide to like how complex the function is... strlen is a simple function.. compiler can deal with this...… Re: Strlen help needed. Got some questions to ask ^ ^ 16 Years Ago by Ancient Dragon I think you misunderstood what strlen() does -- it returns the number of characters in the buffer up to, but not including, the first byte that contains 0. That is normally smaller than the number of characters that the buffer can hold. Example: [icode]char buffer[255] = "Hello";[/icode] In the above, strlen() will return 5. Re: strlen of strdup 15 Years Ago by fpmurphy …. [code] printf("length of str1:%d\n",(int)strlen(str1)); [/code] In the next line of code you lose… Re: strlen behaving strangley ?? 15 Years Ago by duggydiggy … of doing analysis of all the three ways [code] int strlen(const char *str) { const char *eostr=str; while(*eostr++); return… better code than both ?? Lets try this one !! [code] int strlen(const char *str) { const char *eostr=str; while(*eostr) eostr… Re: strlen behaving strangley ?? 15 Years Ago by Dave Sinkula …'ll sidestep the why for a moment and mention that strlen is a reserved identifier and simply should not be used….1.2.3). [/quote] [CODE]identifier context header ISO ANSI strlen ext string.h 7.11.6.3 4.11.6… Re: strlen behaving strangley ?? 15 Years Ago by gerard4143 … 00000000 *UND* 00000000 printf [b]0000006e g F .text 0000002f strlen[/b] [/code] I notice your symbol table is for main… with the libraries yet?...Or is that your point that strlen is resolved here so why is it linking to the… Re: strlen behaving strangley ?? 15 Years Ago by duggydiggy … [/quote] yes behaving same on my side. This is coz strlen is getting linked statically ..not only static linking but also… something inline that function has to be statically linked(here strlen)..but codes cannot be patched(or made inline) at runtime… Re: strlen behaving strangley ?? 15 Years Ago by gerard4143 … works. yes behaving same on my side. This is coz strlen is getting linked statically ..not only static linking but also… something inline that function has to be statically linked(here strlen)..but codes cannot be patched(or made inline) at runtime… Re: strlen behaving strangley ?? 15 Years Ago by duggydiggy … mysterious thing at work...Shouldn't it return the normal strlen result instead of the one I defined here...It doesn… away...[/QUOTE] Tell me how can a compiler calculate the strlen if it does not know what the string is.You… Re: Strlen help needed. Got some questions to ask ^ ^ 16 Years Ago by Ancient Dragon first problem: the while statement is incorrect. Here is how to do it. [icode]while( stats.getline(counter,200) )[/icode] Why do you think strlen() doesn't work? Its been working correctly for millions of programmers all over the globe for over 25 years, so I doubt it has a bug. Re: Strlen help needed. Got some questions to ask ^ ^ 16 Years Ago by dexter1984 I tried using [iCODE]total = strlen(counter)[/iCODE] to replace my total++ but I get 16 … Re: Strlen help needed. Got some questions to ask ^ ^ 16 Years Ago by dexter1984 Aaaa I see, my lecture notes had a similar example and it used the while eof() loop. I'll go read up more on the strlen command. Thanks again. :) strlen in for loop 9 Years Ago by COKEDUDE …bunch of unnecessary iterations in a for loop with strlen doesn't it also produce weird behaviors? http…://www.cprogramming.com/tips/tip/dont-use-strlen-in-a-loop-condition The documentation uses size_t instead…look. http://www.cplusplus.com/reference/cstring/strlen/ http://www.tutorialspoint.com/c_standard_library/c_function_strlen.htm strlen() won't take iterator? 17 Years Ago by JRM … the length of the the string , then display the test. strlen() is not cooperating! Am I using the wrong function? the…()) { cout<< << "length= "<< strlen(*itr) << " "<< *itr++ <<… strlen of array 12 Years Ago by rithish …<n;i++) { scanf("%s",a[i]); } j=strlen(a[0]); printf("%d",j); } here for example…[0] in 15 th line i have done that j=strlen(a[0]) is it possible Re: strlen in for loop 9 Years Ago by rproffitt This is one of those "it depends" questions. If you compile with GCC and other compilers, well, not to give away the answer so read: http://ridiculousfish.com/blog/posts/will-it-optimize.html There's another issue with [strlen() is it is still dangerous at times](http://ridiculousfish.com/blog/posts/will-it-optimize.html).