View Compilation Error

284330_0_19885.cpp: In function `int main()':
284330_0_19885.cpp:7: error: `cin' undeclared (first use this function)
284330_0_19885.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
284330_0_19885.cpp:20: error: invalid conversion from `int*' to `int'
284330_0_19885.cpp:20: error:   initializing argument 1 of `int abs(int)'
284330_0_19885.cpp:22: error: invalid conversion from `int*' to `int'
284330_0_19885.cpp:22: error:   initializing argument 1 of `int abs(int)'
284330_0_19885.cpp:29: error: `cout' undeclared (first use this function)
284330_0_19885.cpp:29: error: `endl' undeclared (first use this function)