Compilare: main.cpp: In function 'int main()': main.cpp:10:13: warning: unused variable 'a' [-Wunused-variable] int n,i,a; ^ main.cpp:14:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ main.cpp:16:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&v[i]); ^