Compilare: user.cpp: In function ‘void ReadData()’: user.cpp:23:16: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] {char type=NULL; ^ user.cpp: In function ‘void Sums()’: user.cpp:37:8: warning: unused variable ‘fout’ [-Wunused-variable] {FILE *fout=fopen("pipe.out","w"); ^ user.cpp: In function ‘void ReadData()’: user.cpp:19:50: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d %d %d %d",&n,&xa,&ya,&xb,&yb); ^ user.cpp:25:41: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%c %d",&type,&lengh); ^