Compilare: main.c: In function 'readInt': main.c:8:13: warning: implicit declaration of function 'isspace' [-Wimplicit-function-declaration] 8 | while ( isspace( ch = fgetc( fin ) ) ); | ^~~~~~~ main.c:12:15: warning: implicit declaration of function 'isdigit' [-Wimplicit-function-declaration] 12 | } while ( isdigit( ch = fgetc( fin ) ) ); | ^~~~~~~ main.c: In function 'main': main.c:19:9: warning: variable 'cer' set but not used [-Wunused-but-set-variable] 19 | int cer, n, d, a, k, divizor, cnt; | ^~~