void printf_vector(const char *fmt, const std::vector< T > &V)
Prints a vector in the format [A,B,C,...] to std::cout, and the fmt string for each vector element.
std::string sprintf_vector(const char *fmt, const VEC &V)
Generates a string for a vector in the format [A,B,C,...] to std::cout, and the fmt string for each v...