View Compilation Error

23956_0_24117.cpp: In function `int main()':
23956_0_24117.cpp:7: error: `scanf' undeclared (first use this function)
23956_0_24117.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
23956_0_24117.cpp:11: error: `printf' undeclared (first use this function)
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