Compilare: main.cpp: In function 'int main()': main.cpp:49:22: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ main.cpp:74:5: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized] if(y==x){ ^~