View Compilation Error

0_0_2180650_23242.cpp:2: error: `main' must return `int'
0_0_2180650_23242.cpp: In function `int main(...)':
0_0_2180650_23242.cpp:2: error: `N' undeclared (first use this function)
0_0_2180650_23242.cpp:2: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2180650_23242.cpp:2: error: `A' undeclared (first use this function)
0_0_2180650_23242.cpp:2: error: `B' undeclared (first use this function)
0_0_2180650_23242.cpp:2: error: `strlen' undeclared (first use this function)
0_0_2180650_23242.cpp:2: error: `S' undeclared (first use this function)