View Compilation Error

0_0_30567599_11184.cpp: In function 'void primes()':
0_0_30567599_11184.cpp:140:31: error: 'memset' was not declared in this scope
  memset(prime, 1, sizeof prime);
                               ^
0_0_30567599_11184.cpp: In function 'int* add(int*, int*)':
0_0_30567599_11184.cpp:158:28: error: 'memset' was not declared in this scope
  memset(ans, 0, sizeof(ans));
                            ^
0_0_30567599_11184.cpp: In function 'int main()':
0_0_30567599_11184.cpp:189:10: error: expected primary-expression at end of input
   if (s1 ==
          ^
0_0_30567599_11184.cpp:189:10: error: expected ')' at end of input
0_0_30567599_11184.cpp:189:10: error: expected statement at end of input
0_0_30567599_11184.cpp:189:10: error: expected '}' at end of input
0_0_30567599_11184.cpp:189:10: error: expected '}' at end of input