Right, don't use `buf` as an input and output with `snprintf`. A lot of people use `str(n)cat` and `str(n)cpy` together like char *a; char *b; char

Right, don't use `buf` as an input and output with `snprintf`. A lot of people use `str(n)cat` and `str(n)cpy` together like char *a; char *b; char *c; strcpy(c, a); strcat(c, b); and I meant that `snprintf` can replace that. But if you actually only have two strings, one with a larger buffer than what it contains, and one to be concatinated, then you can't use `snprintf` like that.