Compilare: main.cpp: In function 'int main()': main.cpp:121:7: warning: unused variable 'i' [-Wunused-variable] int n,i,x,m,a,b; ^ main.cpp:121:11: warning: unused variable 'm' [-Wunused-variable] int n,i,x,m,a,b; ^ main.cpp:125:5: warning: unused variable 'arr' [-Wunused-variable] int arr[1500],narr=0; ^~~ main.cpp:125:15: warning: unused variable 'narr' [-Wunused-variable] int arr[1500],narr=0; ^~~~ main.cpp:119:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("heapuri.in","r",stdin); ^ main.cpp:120:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("heapuri.out","w",stdout); ^ main.cpp: In function 'void Sterge(Node*, int)': main.cpp:88:44: warning: 'rem' may be used uninitialized in this function [-Wmaybe-uninitialized] if (rad->l==NULL && rad->r==NULL) {if(rem->l==rad) rem->l=NULL; else rem->r=NULL; free(rad); return; } ~~~~~^