Generating a Unique Filename

To generate a unique filename that won’t conflict with any other files that exist in the current directory, use the tmpnam() function declared in as follows:

 char * tmpnam(char * name);

The function generates a unique name that may contain up to L_tmpnam characters. You can call tmpnam() up to TMP_MAX (the TMP_MAX and L_tmpnam constants are defined in ) times without generating repeated names. For example:

 #include #include using namespace std;int main(){ char name[L_tmpnam]; for (int n=0; n
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