When were pointers added to C / C++? [closed]

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The version of the C Reference Manual that came with 6th Edition Unix (May 1975), in the second volume entitled “Documents for Use With the Unix Time-sharing System” already contained a description of pointers.

From the manual

Besides the four fundamental types there is a conceptually infinite
class of derived types constructed from the fundamental types in the
following ways:

arrays of objects of most types;
functions which return objects of a given type;
pointers to objects of a given type;
structures containing objects of various types.

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