%s: Input and output are strings -%c characters.
%f: I/O is a floating-point type -%f double-precision floating-point type.
Knowledge expansion:
C language is a computer programming language, which has the characteristics of both high-level language and assembly language. Introduced by D.M.Ritchie of Bell Institute in America on 1972.
After 1978, C language was transplanted to large, medium, small and microcomputer. It can be used as a working system design language to write system applications, and it can also be used as an application design language to write applications independent of computer hardware.
It has a wide range of applications and powerful data processing capabilities, not only in software development, but also in various scientific research. It is suitable for compiling system software, three-dimensional and two-dimensional graphics and animation, as well as specific applications such as single chip microcomputer and embedded system development.