View Compilation Error

0_0_18781045_21392.cpp: In function 'int main()':
0_0_18781045_21392.cpp:14:31: error: expected ')' before ';' token
         memset(c1,0,sizeof(c1);)
                               ^
0_0_18781045_21392.cpp:14:32: error: expected primary-expression before ')' token
         memset(c1,0,sizeof(c1);)
                                ^
0_0_18781045_21392.cpp:15:21: error: 'i' was not declared in this scope
         for(int i=0;i<n;i++)
                     ^