View Compilation Error

0_0_8784836_2766.cpp:2: error: `main' must return `int'
0_0_8784836_2766.cpp: In function `int main(...)':
0_0_8784836_2766.cpp:3: error: `ll' undeclared (first use this function)
0_0_8784836_2766.cpp:3: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8784836_2766.cpp:3: error: expected `;' before "n"
0_0_8784836_2766.cpp:4: error: `t' undeclared (first use this function)
0_0_8784836_2766.cpp:4: error: `scanf' undeclared (first use this function)
0_0_8784836_2766.cpp:7: error: `n' undeclared (first use this function)
0_0_8784836_2766.cpp:8: error: `printf' undeclared (first use this function)