Compilare: user.cpp: In function ‘int cmmdc(int, int)’: user.cpp:6:9: warning: unused variable ‘r’ [-Wunused-variable] int r; ^ user.cpp: In function ‘int main()’: user.cpp:19:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&t); ^ user.cpp:22:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ user.cpp:24:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&v[i]); ^