Comparison of Pascal and C
comparison of two programming languages
The computer programming languages C and Pascal have similar times of origin, influences, and purposes. Both were used to design (and compile) their own compilers early in their lifetimes. The original Pascal definition appeared in 1969 and a first compiler in 1970. The first version of C appeared in 1972.
Both are descendants of the ALGOL language series. ALGOL introduced programming language support for structured programming, where programs are constructed of single entry and single exit constructs such as if, while, for and case. Pascal stems directly from ALGOL W, while it shared some new ideas with ALGOL 68. The C language is more indirectly related to ALGOL, originally through B, BCPL, and CPL, and later through ALGOL 68 (for example in case of struct and union) and also Pascal (for example in case of enumerations, const, typedef and Booleans). Some Pascal dialects also incorporated traits from C.
The languages documented here are the Pascal designed by Niklaus Wirth, as standardized as ISO 7185 in 1982, and the C designed by Dennis Ritchie, as standardized as C89 in 1989. The reason is that these versions both represent the mature version of the language, and also because they are comparatively close in time.
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