Compilare: user.c: In function ‘initialize’: user.c:93: warning: array subscript has type ‘char’ user.c:93: warning: array subscript has type ‘char’ user.c: In function ‘sort’: user.c:111: warning: array subscript has type ‘char’ user.c:111: warning: array subscript has type ‘char’ user.c:112: warning: array subscript has type ‘char’ user.c:112: warning: array subscript has type ‘char’ user.c: In function ‘mat_create’: user.c:138: warning: array subscript has type ‘char’ user.c: In function ‘mat_copy’: user.c:148: warning: array subscript has type ‘char’ user.c:148: warning: array subscript has type ‘char’ user.c:148: warning: array subscript has type ‘char’ user.c:148: warning: array subscript has type ‘char’ user.c: In function ‘mat_delete’: user.c:156: warning: array subscript has type ‘char’ user.c: In function ‘read_first_line’: user.c:169: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c: In function ‘read_data’: user.c:181: warning: array subscript has type ‘char’ user.c:182: warning: array subscript has type ‘char’ user.c:182: warning: array subscript has type ‘char’ user.c:194: warning: array subscript has type ‘char’ user.c:194: warning: array subscript has type ‘char’ user.c:194: warning: array subscript has type ‘char’ user.c:194: warning: array subscript has type ‘char’ user.c:181: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c:188: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c: In function ‘floyd_compute’: user.c:207: warning: array subscript has type ‘char’ user.c:207: warning: array subscript has type ‘char’ user.c:207: warning: array subscript has type ‘char’ user.c:207: warning: array subscript has type ‘char’ user.c:207: warning: array subscript has type ‘char’ user.c:207: warning: array subscript has type ‘char’ user.c:207: warning: array subscript has type ‘char’ user.c:207: warning: array subscript has type ‘char’ user.c:207: warning: array subscript has type ‘char’ user.c:207: warning: array subscript has type ‘char’ user.c:207: warning: array subscript has type ‘char’ user.c:207: warning: array subscript has type ‘char’ user.c:209: warning: array subscript has type ‘char’ user.c:209: warning: array subscript has type ‘char’ user.c:210: warning: array subscript has type ‘char’ user.c:210: warning: array subscript has type ‘char’ user.c:211: warning: array subscript has type ‘char’ user.c:211: warning: array subscript has type ‘char’ user.c:213: warning: array subscript has type ‘char’ user.c:213: warning: array subscript has type ‘char’