CODEWITHSUNDEEP
cstringcharprintf
Hefaestion
Hefaestion

Reputation: 203

Turn a byte of hex into a char string

When I attempt to convert one byte of hex into a char string I find that it takes 3 bytes. I am using Visual Studio 2013.

If I have less than 3 bytes I get an error: "Stack around the variable 'str' was corrupted."

What am I doing wrong? Surely the hex value 0xF1 should fit into char str[1]? Why should I have to declare a 3 byte array to assign a 1 byte value?

char str[3];
sprintf(str, "%02X", 0xF1);

The content of stris 0x0026fd18 "F1"

Upvotes: 0

Views: 197

Answers (1)

Random Davis
Random Davis

Reputation: 6857

The issue is that's trying to print "F1" into the string followed by a null terminator - this would be three bytes. That's the whole point of the sprintf function - it formats the input into a readable string. If you're trying to simply assign the hex value of 0xF1 to a char, you would do it like this:

char str = (char)0xF1

Upvotes: 2

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