View Compilation Error

0_0_23606392_21113.cpp: In function 'void get_sg(int, int)':
0_0_23606392_21113.cpp:7:12: error: 'sg' was not declared in this scope
     memset(sg,0,sizeof(sg));
            ^
0_0_23606392_21113.cpp:7:27: error: 'memset' was not declared in this scope
     memset(sg,0,sizeof(sg));
                           ^
0_0_23606392_21113.cpp:10:16: error: 'mex' was not declared in this scope
         memset(mex,0,sizeof(mex));
                ^
0_0_23606392_21113.cpp:12:27: error: 'fib' was not declared in this scope
         for( j=1 ;j<=t && fib[j]<=i ;j++ )
                           ^