Compilare: user.cpp: In function ‘int main()’: user.cpp:77:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d",&N,&M); ^ user.cpp:85:49: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&S[i].Gang[pos%Rad].val),pos++; ^ user.cpp:92:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&Type); ^ user.cpp:95:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d",&X,&Y); ^ user.cpp:102:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&X); ^ user.cpp: In function ‘int Lower_Bound(Special*, int, int)’: user.cpp:45:15: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] int lw=1,mid,last; ^ user.cpp: In function ‘int Query(int)’: user.cpp:65:26: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] act=S[i].Stack[act].pos; ^