Compilare: user.c: In function ‘B’: user.c:86: warning: implicit declaration of function ‘C’ user.c: In function ‘main’: user.c:162: warning: format ‘%d’ expects type ‘int *’, but argument 3 has type ‘char *’ user.c:155: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:159: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:162: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result