Compilare: user.cpp: In function ‘int main()’: user.cpp:9:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] b[i]=(t+=a[i]+b[i])%10; ^ user.cpp:9:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] b[i]=(t+=a[i]+b[i])%10; ^ user.cpp:9:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] b[i]=(t+=a[i]+b[i])%10; ^ user.cpp:11:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[i]=b[i]-(i<=a[0]?a[i]:0)-t,a[i]+=(t=a[i]<0)*10; ^ user.cpp:11:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[i]=b[i]-(i<=a[0]?a[i]:0)-t,a[i]+=(t=a[i]<0)*10; ^ user.cpp:11:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[i]=b[i]-(i<=a[0]?a[i]:0)-t,a[i]+=(t=a[i]<0)*10; ^ user.cpp:11:45: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[i]=b[i]-(i<=a[0]?a[i]:0)-t,a[i]+=(t=a[i]<0)*10; ^ user.cpp:11:54: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[i]=b[i]-(i<=a[0]?a[i]:0)-t,a[i]+=(t=a[i]<0)*10; ^ user.cpp:12:37: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(a[0]=i-1;a[0]>1&&!a[a[0]];a[0]--); ^ user.cpp:15:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] fprintf(g,"%c",b[i]); ^ user.cpp:6:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%hd",&n); ^