Compilare: main.cpp: In function 'void bordare(int)': main.cpp:53:7: warning: unused variable 'i' [-Wunused-variable] int i, j; ^ main.cpp:53:10: warning: unused variable 'j' [-Wunused-variable] int i, j; ^ main.cpp: In function 'int main()': main.cpp:61:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^