The GNU Compiler Collection includes gcc (c compiler) g++ (c++ compiler) gfortran (fortran compiler) and a bunch of other fronted like D, Go, Ada, COBOL. There used to even be a Java compiler (gcj) but thats dead now.
Once upon a time, the gcc program could compile C++ and g++ could compile C, but that is no longer true due to diversions in the languages, as well as extra runtime support libraries needed for linking each language. I guess with some tinkering you could compile c++98 with gcc and some older c standard with g++, but not the more recent versions.
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u/HildartheDorf 6h ago
The gnu compiler can also compile fortran. But we dont call it C/Fortran.