String Padding in C

Question

I wrote this function that\'s supposed to do StringPadRight(\"Hello\", 10, \"0\") -> \"Hello00000\".

char *StringPadRight(char *string, int padded_len, char          


        

Answer 1

The argument you passed "Hello" is on the constant data area. Unless you've allocated enough memory to char * string, it's overrunning to other variables.

char buffer[1024];
memset(buffer, 0, sizeof(buffer));
strncpy(buffer, "Hello", sizeof(buffer));
StringPadRight(buffer, 10, "0");

Edit: Corrected from stack to constant data area.