Compilare: user.cpp: In member function ‘bool cmp1::operator()(const arte&, const arte&) const’: user.cpp:30:5: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a.v==b.v) ^ user.cpp: In member function ‘bool cmp2::operator()(const art&, const art&) const’: user.cpp:39:5: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a.v==b.v) ^ user.cpp: In function ‘int cb(art)’: user.cpp:74:12: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] else if(el.l==e[m].l) ^ user.cpp: In function ‘int main()’: user.cpp:117:24: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘unsigned int’ [-Wformat=] printf("%ld\n",smin); ^ user.cpp:84:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("suma3.in","r",stdin); freopen("suma3.out","w",stdout); ^ user.cpp:84:67: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("suma3.in","r",stdin); freopen("suma3.out","w",stdout); ^ user.cpp: In function ‘void cit(int&)’: user.cpp:17:52: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(++pz==DIM)fread(ax, 1, DIM, stdin), pz=0; ^ user.cpp:20:54: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(++pz==DIM)fread(ax,1, DIM, stdin),pz=0; ^