Compilare: user.c: In function ‘main’: user.c:23:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(nr==c && f[ch]==0){ ^ user.c:32:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] f[ch]=1; ^ user.c:33:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[ch]=i; ^ user.c:35:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] else if(f[ch]==1) ^ user.c:36:7: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[ch]=i; ^ user.c:39:7: warning: array subscript has type ‘char’ [-Wchar-subscripts] f[ch]=1; ^ user.c:40:7: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[ch]=i; ^ user.c:12:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d%d",&n, &c); ^ user.c:14:8: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(sir,55000,fi); ^ user.c:30:18: warning: ‘mincul’ may be used uninitialized in this function [-Wmaybe-uninitialized] f[mincul]=0; ^