Using GDB, I find I get a segmentation fault when I attempt this operation:
strcat(string,¤tChar);
Given that string is initialized as
char * string = "";
and currentChar is
char currentChar = 'B';
Why does this result in a segmentation fault?
If strcat can't be used for this, how else can I concat a char onto a string?
As responded by others, ¤tChar is a pointer to char or char*, but a string in C is char[] or const char*.
One way to use strcat to concatenate a char to string is creating a minimum string and use it to transform a char into string.
Example:
Making a simple string, with only 1 character and the suffix '\0';
char cToStr[2];
cToStr[1] = '\0';
Applying to your question:
char * string = "";
char currentChar = 'B';
cToStr will assume the string "B":
cToStr[0] = currentChar;
And strcat will work!
strcat ( string, cToStr );