Compilare: user.cpp: In function ‘void bkt(int, int)’: user.cpp:51:36: warning: statement has no effect [-Wunused-value] col[c]=di2[diag2(l,c)]=1;1; ^ user.cpp: In function ‘int main()’: user.cpp:75:39: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[9]’ [-Wformat=] for (i=0;i<=7;i++) fscanf(f,"%s",&s[i]); ^ user.cpp:75:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (i=0;i<=7;i++) fscanf(f,"%s",&s[i]); ^