Compilare: user.cpp: In function ‘void prelsol()’: user.cpp:24:13: warning: array subscript has type ‘char’ [-Wchar-subscripts] { smin=s[n]; ^ user.cpp: In function ‘void back(arte&, short int)’: user.cpp:40:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] s[k]=s[k-1]+p[k][x[k]]; ^ user.cpp: In function ‘int main()’: user.cpp:76:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(vl) {n++; e[n].v=vl; e[n].l=i; e[n].c=j;} ^ user.cpp:76:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(vl) {n++; e[n].v=vl; e[n].l=i; e[n].c=j;} ^ user.cpp:76:40: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(vl) {n++; e[n].v=vl; e[n].l=i; e[n].c=j;} ^ user.cpp:91:24: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘int’ [-Wformat=] printf("%ld\n",smin); ^ user.cpp:71:34: 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:71:67: 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(short 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; ^