Computer programs are usually written in programming languages. A programming language is considered to be good if it can enable the programmer to give directions to the computer without error. General purpose computer languages are FORTRAN, C and PASCAL. There exist many similarities between real-time languages and general purpose languages. Both are readable, have constructs which enhances comprehensibility, can be used in different hardware platforms and easy to debug and compile. Programmer initially should specify priorities and run-time requirements. A good real-time language makes it possible to write device interfaces effectively. In real-time systems, software is complex than the hardware. Chance for software design fault is more compared to hardware design fault. Here programmers have the freedom to use comments throughout the program. Another important aspect here is that the programmer has the option of specifying minimum acceptable precision of each variable.
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