View Compilation Error

0_0_24906355_21444.cpp: In function 'int main()':
0_0_24906355_21444.cpp:18:33: error: 'memset' was not declared in this scope
         memset(sum,0,sizeof(sum));  
                                 ^
0_0_24906355_21444.cpp:51:13: error: expected '}' at end of input
     return 0; 
             ^