View Compilation Error

0_0_32577481_10593.cpp: In function 'int main()':
0_0_32577481_10593.cpp:44:18: error: 'o' was not declared in this scope
         memset(a,o,sizeof(a));
                  ^
0_0_32577481_10593.cpp:44:29: error: 'memset' was not declared in this scope
         memset(a,o,sizeof(a));
                             ^