Main.cc: In function ‘int main()’: Main.cc:7:5: error: ‘strlen’ was not declared in this scope lx=strlen(x); ^~~~~~ Main.cc:7:5: note: suggested alternative: ‘mbrlen’ lx=strlen(x); ^~~~~~ mbrlen Main.cc:20:3: error: ‘memcpy’ was not declared in this scope memcpy(x,y,sizeof(y)); ^~~~~~ Main.cc:20:3: note: suggested alternative: ‘wmemcpy’ memcpy(x,y,sizeof(y)); ^~~~~~ wmemcpy Main.cc:21:3: error: ‘memset’ was not declared in this scope memset(y,0,sizeof(y)); ^~~~~~ Main.cc:21:3: note: suggested alternative: ‘wmemset’ memset(y,0,sizeof(y)); ^~~~~~ wmemset