Compilare: main.cpp: In function 'int main()': main.cpp:13:9: warning: unused variable 'i' [-Wunused-variable] int i,j; ^ main.cpp:13:11: warning: unused variable 'j' [-Wunused-variable] int i,j; ^ main.cpp: In function 'void regina(int)': main.cpp:51:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(ok=1,j=1;j<k;j++) ^~~ main.cpp:54:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' if(ok) ^~ main.cpp: In function 'int main()': main.cpp:14:23: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^