Compilare: user.cpp: In function ‘int main()’: user.cpp:28:39: warning: unused variable ‘x’ [-Wunused-variable] int n, i, cmmc, a, b, r, nr, prod,x; ^ user.cpp:30:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.cpp:34:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &v[i]); ^ user.cpp:43:20: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] prod=cmmc*b; ^