Compilare: user.c: In function ‘mprint’: user.c:69:9: warning: implicit declaration of function ‘print’ [-Wimplicit-function-declaration] fr(j,0,2) print(A+2*i+j),printf(" "); ^ user.c: At top level: user.c:73:6: warning: conflicting types for ‘print’ [enabled by default] void print(bign*a){ ^ user.c:69:19: note: previous implicit declaration of ‘print’ was here fr(j,0,2) print(A+2*i+j),printf(" "); ^ user.c: In function ‘main’: user.c:108:10: warning: unused variable ‘C’ [-Wunused-variable] bign*C=(bign*)c; ^