Compilare: main.cpp: In function 'int main()': main.cpp:28:9: warning: unused variable 't' [-Wunused-variable] int t, a, b, c, x, y; ^ main.cpp:28:18: warning: unused variable 'c' [-Wunused-variable] int t, a, b, c, x, y; ^ main.cpp:29:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &a,&b); ^