c++ - Program not using all of CPU? -

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i wrote simple program in c++ like:

while(1){var+=1;var-=1;}

and ran it, seems use 25% of cpu.

how can increase amount of cpu program use, 95%?

sounds you're running on 4-processor system. are using 100% of cpu on 1 core. use other cores, have write multi-thread version of application.

multi-threading complicated, there lots of tutorials out there; hit google. luck!

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