View Compilation Error

0_0_2530856_6538.cpp: In function `int main()':
0_0_2530856_6538.cpp:6: error: `cin' undeclared (first use this function)
0_0_2530856_6538.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2530856_6538.cpp:27: error: expected `]' before ')' token