Compilare: main.cpp: In function 'int main()': main.cpp:24:12: warning: variable 'a' set but not used [-Wunused-but-set-variable] int n, a, i, s, j; ^ main.cpp:28:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &n ); ^ main.cpp:30:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &v[i] ); ^