Just wondering, how high can c++ really count? Because I made a fibonacci program, and it starts acting weird and printing negatives at about 10-11 places. With both long, and int variables? Is it impossible to count higher? If not, how?

Clinton Portis 211

valestrom 17

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Chilton 22

valestrom 17

Chilton 22

Zssffssz -4

mike_2000_17 2,669

Clinton Portis 211

L7Sqr 227

Clinton Portis 211