View Compilation Error

635523_0_0_13917.cpp: In function `bool millerRabin(int, int)':
635523_0_0_13917.cpp:18: error: `rand' undeclared (first use this function)
635523_0_0_13917.cpp:18: error: (Each undeclared identifier is reported only once for each function it appears in.)
635523_0_0_13917.cpp: In function `int main()':
635523_0_0_13917.cpp:28: error: `scanf' undeclared (first use this function)
635523_0_0_13917.cpp:35: error: `printf' undeclared (first use this function)