C++ strncpy()
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strncpy() in C++ copies the first n characters of the source to the destination. In the case of a count less than the length of the source, strncpy() in C++ copied the first count characters over to the destination and it is not null-terminated. In cases where the count exceeds the source, strncpy() in C++ copies all the characters from the source to the destination. In addition, terminating null characters are added to the destination until the total number of characters equals the count.
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Syntax of strncpy() in C++.
Parameters of strncpy() in C++
dest − A pointer that points to the destination array where the content will be copied.
src − This is the string to be copied.
n − This is the number of characters that must be copied from the source.
Return value of strncpy() in C++
strncpy() in C++ returns the pointer to the copied string.
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What is strncpy() in C++
strncpy() in C++ copies up to n characters from the string pointed to by src to the string pointed to by dest.
There can be two cases depending on the value of n and the length of the source.
The strncpy() in C++ checks for the value of n, and according to the value of n, the strncpy() copies the characters from the source to the destination.
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How does strncpy() in C++ works
If the length of the source is less than n i.e., there are not enough characters to be copied then, null bytes will be added to the remainder of dest. If the source is longer than num, i.e., n characters can be copied from the length of the source, then no null character is appended to the destination.
Examples
- When the count is less than the length of the src
Output
- When count is more than length of src
Output
Conclusion
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strncpy() in C++ copies the first n characters of the source to the destination.
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There can be two cases depending on the value of n and the length of the source.
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If the length of the source is less than n - strncpy() in C++ copies all the characters from the source to the destination. In addition, terminating null characters are added to the destination until the total number of characters equals the count.
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If the length of the source is greater than n - strncpy() in C++ copies the first n characters to the destination, not null-terminated.
