View Compilation Error

0_0_11051909_23684.cpp: In function `int main()':
0_0_11051909_23684.cpp:5: error: `scanf' undeclared (first use this function)
0_0_11051909_23684.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11051909_23684.cpp:9: error: `gay' undeclared (first use this function)
0_0_11051909_23684.cpp:10: error: `csh' undeclared (first use this function)
0_0_11051909_23684.cpp:15: error: `fine' undeclared (first use this function)
0_0_11051909_23684.cpp:19: error: `quan' undeclared (first use this function)
0_0_11051909_23684.cpp:22: error: `mege' undeclared (first use this function)
0_0_11051909_23684.cpp:25: error: `printf' undeclared (first use this function)