Compilare: user.c: In function ‘main’: user.c:106:30: warning: ‘return’ with no value, in function returning non-void [enabled by default] if(a==0){fprintf(f,"0"); return;} ^ user.c:120:17: warning: unused variable ‘temp’ [-Wunused-variable] int suma=0, temp=0; ^ user.c:100:14: warning: variable ‘g’ set but not used [-Wunused-but-set-variable] FILE *f,*g; ^ user.c:111:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&x); ^