0_0_16461684_6729.cpp: In function 'void init()': 0_0_16461684_6729.cpp:6:35: error: 'memset' was not declared in this scope #define cl(a) memset(a,0,sizeof(a)) ^ 0_0_16461684_6729.cpp:30:5: note: in expansion of macro 'cl' cl(z);cl(f); ^