strcpy_s() function copies the contents of one string variable to another.
Here's an example:
char source = "test test test."; char destination; if(strcpy_s(destination, sizeof(destination), source)) printf("An error occurred copying the string.\n");
The condition of if statement is an expression that calls strcpy_s() to copy the contents of the source array.
The value of the expression is the value returned by strcpy_s().
This will be 0 if the copy works and nonzero if it doesn't.
A nonzero integer value corresponds to true, the printf() call will be executed to output an error message.
strncpy_s() function can copy part of the source string to the destination.
The first three arguments are the same as for strcpy_s(), and the fourth argument specifies the maximum number of characters to be copied.
If a \0 is found in the source string before the maximum specified characters have been copied, copying ceases and the \0 is appended to the destination.
char source = "this is a test test test test test test."; char destination; if(strncpy_s(destination, sizeof(destination), source, 17)) printf("An error occurred copying the string.\n");