The research field of discrete mathematics is closely related to computer, which is a discrete structure, which is why discrete mathematics is called discrete mathematics. There is no discrete mathematics in high school, but there are knowledge blocks related to discrete mathematics.

See: Discrete Mathematics is a comprehensive subject that integrates traditional logic, set theory (including functions), number theory, algorithm design, combinatorial analysis, discrete probability, relation theory, graph theory and tree, and abstract algebra (including algebraic systems, groups, rings, fields, etc.). ), Boolean algebra and computational models (languages and automata).

Books, I'm not a teacher. . I have never tried to teach myself this. Dare not mislead others' children

I suggest you study civil engineering ~ ~