Compilare: user.c:23: warning: return type of ‘main’ is not ‘int’ user.c: In function ‘main’: user.c:46: warning: implicit declaration of function ‘fcloseall’ user.c:34: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c: In function ‘cmmdc_func’: user.c:20: warning: control reaches end of non-void function