Compilare: user.c: In function ‘main’: user.c:10:5: warning: format ‘%s’ expects argument of type ‘char *’, but argument 3 has type ‘char (*)[501]’ [-Wformat=] fscanf(f,"%s",&a); ^ user.c:18:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] ++v[a[i]]; ^ user.c:11:34: warning: unused variable ‘k’ [-Wunused-variable] int i, j, sum = 0 , lungime, k; ^ user.c:11:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, sum = 0 , lungime, k; ^ user.c:10:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",&a); ^