Compilare: user.cpp: In function ‘int main()’: user.cpp:9:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d" ,&n ,&p ,&k); ^ user.cpp:11:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d" ,&a ,&b); ^ user.cpp:5:9: warning: ‘ap’ may be used uninitialized in this function [-Wmaybe-uninitialized] int ap, maxim=0, n, k, p, l, i, j, a, b, sum; ^~