Compilare: user.c: In function ‘main’: user.c:72:5: warning: format ‘%s’ expects argument of type ‘char *’, but argument 2 has type ‘char (*)[200000]’ [-Wformat=] scanf("%s",&expression); ^ user.c:69:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("evaluare.in","r",stdin); ^ user.c:70:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("evaluare.out","w",stdout); ^ user.c:72:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&expression); ^