Compilare: user.cpp: In function ‘int main()’: user.cpp:16:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&t); ^ user.cpp:20:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&n); ^ user.cpp:24:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&x); ^ user.cpp:49:33: warning: ‘b’ may be used uninitialized in this function [-Wmaybe-uninitialized] r = (long long)a*b/i; ^ user.cpp:49:33: warning: ‘a’ may be used uninitialized in this function [-Wmaybe-uninitialized]