Compilare: user.cpp: In function ‘int main()’: user.cpp:62:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&m); ^ user.cpp:66:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&x); ^ user.cpp:72:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&tp); ^ user.cpp:75:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] case 0: fscanf(f,"%d%d",&a,&b); update(b,a); break; ^ user.cpp:76:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] case 1: fscanf(f,"%d%d",&a,&b); fprintf(g,"%d\n",query1(a-1,b)); break; ^ user.cpp:77:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] case 2: fscanf(f,"%d",&a); fprintf(g,"%d\n",Search(a));break; ^