You are currently viewing LQ as a guest. You're headed in the wrong direction.). pointer to has indeterminate value. Take into account that you may not use pointer to declared like. \$\begingroup\$ @CO'B, declare, not define The stdlib.h on my system has a bunch of typedefs, #defines, and function declarations like extern double atof (const char *__nptr); (with some macros sprinkled in, most likely related to compiler-specific notes) \$\endgroup\$ - There's no general way, but if you have predetermined that you just want to copy a string, then you can use a function which copies a string. Copying stops when source points to the address of the null character ('\0'). By using this website, you agree with our Cookies Policy. But I agree with Ilya, use std::string as it's already C++. A more optimal implementation of the function might be as follows. Python A number of library solutions that are outside the C standard have emerged over the years to help deal with this problem. Is it known that BQP is not contained within NP? how to copy from char pointer one to anothe char pointer and add chars between, How to read integer from a char buffer into an int variable. Like strlcpy, it copies (at most) the specified number of characters from the source sequence to the destination, without writing beyond it. However "_strdup" is ISO C++ conformant. If it's your application that's calling your method, you could even receive a std::string in the first place as the original argument is going to be destroyed. char * strncpy ( char * destination, const char * source, size_t num ); 1.num 2.num0num The severity of the inefficiency increases in proportion to the size of the destination and in inverse relation to the lengths of the concatenated strings. However, by returning a pointer to the first character rather than the last (or one just past it), the position of the NUL character is lost and must be computed again when it's needed. The resulting character string is not null-terminated. ins.className = 'adsbygoogle ezasloaded'; How to copy from const char* variable to another const char* variable in C? vs2012// priority_queue.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include
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