C++ and C can generate exactly the same speed code. The difference is, C++ has more libraries and some of the library implementations can be much faster or much slower than the equivalent C only version of the code .
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Performance-based on Nature Of Language C++ language is an object-oriented programming language, and it supports some important features like Polymorphism, Abstract Data Types, Encapsulation, etc. Since it supports object-orientation, speed is faster compared to the C language .
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