Compilare: main.cpp: In function 'int main()': main.cpp:42:16: warning: unused variable 'dr' [-Wunused-variable] int n, a, b, dr, p, y, i, x; ^~ main.cpp:42:20: warning: unused variable 'p' [-Wunused-variable] int n, a, b, dr, p, y, i, x; ^ main.cpp:42:23: warning: unused variable 'y' [-Wunused-variable] int n, a, b, dr, p, y, i, x; ^ main.cpp:42:29: warning: unused variable 'x' [-Wunused-variable] int n, a, b, dr, p, y, i, x; ^ main.cpp:45:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d",&n,&m); ^ main.cpp:47:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d",&a,&b); ^