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Re: memcpy 17 Years Ago by alwayshere memcpy(a,s,strlen(s)+1) instead if this run the same prgm using memcpy(a,s,strlen(s)-1)...you will get to know that s is changing. Re: memcpy 17 Years Ago by dougy83 …is being affected. Only [b]a[/b] is changed by memcpy. Try the following to see that you need to null…quot;enter the string :"<<endl; gets(s); //memcpy char a[100]; ZeroMemory(a, sizeof(a)); // fill array …with a know quantity memcpy(a,s,strlen(s)+1);//here if we decrease bytes… memcpy 17 Years Ago by alwayshere … the string :"<<endl; gets(s); //memcpy char a[100]; memcpy(a,s,strlen(s)+1);//here if we decrease… Re: memcpy 17 Years Ago by dougy83 … to you if you don't bother to listen. [quote]memcpy(a,s,strlen(s)+1) instead if this run the… same prgm using memcpy(a,s,strlen(s)-1)...you will get to know… memcpy <> 12 Years Ago by Suzie999 …[0] to unsigned char[24] to pass paramaters. I used memcpy for this, but it seems I can only copy to… Re: memcpy <> 12 Years Ago by Suzie999 Sorry if I took your time, but I realized solution. I needed to prefix address referencer (&) to the dst param of memcpy and prepend it with index number([4]). Thank you for your patience. Re: memcpy and memmove 15 Years Ago by Iam3R …() { char mc[]="abc"; char mm[]="abc"; memcpy(mc+1, mc , 2 ); memmove( mm+1 , mm , 2);… (a <= b || b >= (a + n)) { /* No overlap, use memcpy logic (copy forward) */ while (n--) *a++ = *b++; } else { /* Overlap… Re: memcpy and memmove 15 Years Ago by Narue …bytes between the source and destination: [code] void *memcpy (void *dst, const void *src, size_t n)… b || b >= (a + n)) { /* No overlap, use memcpy logic (copy forward) */ while (n--) *a++ = *b++; } else…dst; } [/code] These algorithms are naive, but memcpy is less restricted and thus more open to optimization. However… memcpy and memmove 15 Years Ago by Iam3R …manual page says that memory area should not overlap in memcpy but can in memmove. what is meant by moving… memory and how its safe . why memcpy is dangerous. [CODE] int main() { char strmc[]="… memcyp : the string <strings are good> after memcpy the string <sstrigs are good> before memmove : … memcpy function 16 Years Ago by shamila08 … got this code. However i'm really not familiar with memcpy function. Can anybody can show me the other way to…;< k << "\n"; memcpy (temp , saveptr, n); memcpy (temp + n , saveptr, n); // memcpy (saveptr, temp+n - 1, n); // } [/code… memcpy of a struct 12 Years Ago by rebelstar Hello, i am facing some problem with a memcpy. I have a struct. lets us say struct { unsigned in[… the contents from B to A. if i do a memcpy(&A,&B& ,sizeof(A)); // This works perfectly… well. But if i do memcpy( &A,&B,sizeof(A/2)); memcpy( &A+sizeof(A/2), &… Re: memcpy of a struct 12 Years Ago by dx9_programmer …;abcd" }, b = { "mnop" }; memcpy(&a, &b, sizeof(a)/2); memcpy((char*)&a+2, (char*)&b… a name struct info { [variables here] }; ... memcpy(&A, &B, sizeof(A)/2); memcpy((struct info*)&A+sizeof(A)/2… Re: memcpy and memmove 15 Years Ago by Salem > does the standard definition of memcpy varies from system to system ? No, the standard DEFINITION is … Re: memcpy of a struct 12 Years Ago by dx9_programmer Try using a smaller example. Like struct { char s[5]; } a = { "abcd" }, b = { "mnop" }; memcpy(&a, &b, sizeof(a)/2); memcpy(&a+2, &b+2, sizeof(a)/2); printf("%s", a.s); // should be "mnop" Memcpy Char Pointers 11 Years Ago by tanatos.daniel …in which I want to concatenate two char pointers using memcpy, but I get access violation writing location on the… memcpy line. Why is this happening and what could be … printf("first: "); scanf("%s",&first); memcpy(first,second,strlen(second)+1); printf ("Result: %s, %d… Re: memcpy with int clears entire buffer 15 Years Ago by Ancient Dragon … the case of an integer whose value is 1. After memcpy() the buffer will contain (*nix operating system the bytes are… buffer[/b] There are two methods: [list=1] [*]memcpy(); [icode]int x; memcpy(&x, buf, sizeof(int));[/icode] [*]direct assignment with… Re: memcpy Accesses Violation error. 15 Years Ago by Ancient Dragon why are you even using memcpy() -- what you want is strcpy(), not memcpy(). memcpy() is normally used to copy blopbs of binary data not standard null-terminated strings. memcpy and strcpy 12 Years Ago by shanki himanshu what is difference between a)strcpy and memcpy b) memcpy and memmov? Re: memcpy and strcpy 12 Years Ago by deceptikon … you to specify how many bytes are being copied. memcpy() isn't guaranteed to be safe if the source and … Re: memcpy and strcpy 12 Years Ago by shanki himanshu > Quoted Text Here > strcpy() uses '\0' as the stopping character char str[] = "mem\0abc"; char str1[20]; memcpy (str1,str,10); //strcpy(str1,str); puts (str1); both memcpy and strcpy giving me same output i.e. mem Re: memcpy and strcpy 12 Years Ago by deceptikon > this means when i used memcpy the whole string is copied in str1 while using strcpy str1 contains only "mem"?? Yes, though since you told memcpy() to copy 10 bytes, you wrote too many characters and invoked undefined behavior. `str` only contains 8 characters, after all (including null characters). Re: memcpy and strcpy 12 Years Ago by shanki himanshu > str1="strings are good"); > memmove(str1+8,str1+11,4); > returns------ strings are are good > memcpy(str+8,str1+11,4) > returns------ strings are read i run the above code. i am getting "strings googood" as my output for both cases i understand my memmove output but why it is same as memcpy? Re: memcpy and strcpy 12 Years Ago by Ancient Dragon >i understand my memmove output but why it is same as memcpy? Both functions produce the same results. The only real difference is whether the destination and source buffers overlap. If they don't, then use memcpy(), otherwise if they do then use memmove(). Re: Memcpy Char Pointers 11 Years Ago by Ancient Dragon … characters on line 3? Answer: the program will crash because memcpy will copy the last few characters outside the bounds of… Re: memcpy with int clears entire buffer 15 Years Ago by cmk2901 … having some trouble understanding how the char buffer works with memcpy. I'm allocating the space at initialization using: [CODE] char…, when I do the following: [CODE] int fd = *any number*; memcpy(buffer + pageFrameOffset, &fd, 4); [/CODE] as noted in my… Re: memcpy Accesses Violation error. 15 Years Ago by gerard4143 … ch2[50]; }; void myfunc(struct mystr *str1, struct mystr *str2) { memcpy(&str2->ch1[0], &str1->ch1[0…], sizeof(str1->ch1)); memcpy(&str2->ch2[0], &str1->ch2[0… Re: memcpy and strcpy 12 Years Ago by deceptikon strcpy() and memcpy() aren't the ones doing the outputing. Obviously if there's a null character in the middle of the string, puts() will stop on it. Re: memcpy and strcpy 12 Years Ago by shanki himanshu this means when i used memcpy the whole string is copied in str1 while using strcpy str1 contains only "mem"?? Re: memcpy and strcpy 12 Years Ago by shanki himanshu and what about memcpy and memmov? can u explain me with the help of a code? Re: memcpy and strcpy 12 Years Ago by rithish str1="strings are good"); memmove(str1+8,str1+11,4); returns------ strings are are good memcpy(str+8,str1+11,4) returns------ strings are read