Compilare: main.cpp: In function 'int main()': main.cpp:10:15: warning: unused variable 'x' [-Wunused-variable] int i, j, x, max; ^ main.cpp:11:22: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ main.cpp:13:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&a[i]); ^ main.cpp:24:16: warning: 'max' may be used uninitialized in this function [-Wmaybe-uninitialized] for(i=2 ;i <= max; i++) { ~~^~~~~~