View Compilation Error

0_0_11275777_5540.cpp:24: error: `ll' does not name a type
0_0_11275777_5540.cpp:27: error: `ll' does not name a type
0_0_11275777_5540.cpp:29: error: `ll' does not name a type
0_0_11275777_5540.cpp:30: error: `ll' does not name a type
0_0_11275777_5540.cpp: In function `int main()':
0_0_11275777_5540.cpp:48: error: `f1' undeclared (first use this function)
0_0_11275777_5540.cpp:48: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11275777_5540.cpp:49: error: `f2' undeclared (first use this function)
0_0_11275777_5540.cpp:50: error: `g1' undeclared (first use this function)
0_0_11275777_5540.cpp:51: error: `g2' undeclared (first use this function)
0_0_11275777_5540.cpp:63: error: `mod' undeclared (first use this function)
0_0_11275777_5540.cpp:82: error: `res' undeclared (first use this function)