Compilare: main.cpp: In function 'void read()': main.cpp:15:11: warning: array subscript has type 'char' [-Wchar-subscripts] 15 | f[a]++; | ^ main.cpp:21:27: warning: array subscript has type 'char' [-Wchar-subscripts] 21 | f[b]++; | ^ main.cpp:26:35: warning: array subscript has type 'char' [-Wchar-subscripts] 26 | f[k]=0; | ^ main.cpp:27:27: warning: array subscript has type 'char' [-Wchar-subscripts] 27 | f[b]++; | ^ main.cpp:42:22: warning: array subscript has type 'char' [-Wchar-subscripts] 42 | if(f[k]) | ^ main.cpp:45:27: warning: array subscript has type 'char' [-Wchar-subscripts] 45 | f[k]--; | ^ main.cpp:48:11: warning: array subscript has type 'char' [-Wchar-subscripts] 48 | f[c]++; | ^ main.cpp:51:23: warning: array subscript has type 'char' [-Wchar-subscripts] 51 | lim=f[k]; | ^ main.cpp:41:16: warning: 'c' may be used uninitialized [-Wmaybe-uninitialized] 41 | for(k=c+1;k<=57;k++) | ~^~ main.cpp:8:18: note: 'c' was declared here 8 | char a,b,c,k; | ^