Compilare: user.c: In function ‘main’: user.c:6:22: warning: unused variable ‘p2’ [-Wunused-variable] int a,n,i,j,x,p1,p2; ^ user.c:9:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d" ,&n); ^ user.c:28:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d" ,&n); ^ user.c:39:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d" ,&n); ^ user.c:41:5: warning: ‘p1’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(i=0;i<p1;i++){ ^ user.c:47:10: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] vf[x]--; ^