Compilare: main.cpp: In function 'int main()': main.cpp:47:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n,&k); ^ main.cpp:50:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &a[i]); ^ main.cpp: In function 'bool verifica(int)': main.cpp:35:18: warning: 'sum' may be used uninitialized in this function [-Wmaybe-uninitialized] if(nrsecv==k and sum>=x) ~~~~~~~~~~^~~~~~~~~~