Compilare: user.c: In function ‘readInput’: user.c:10:26: warning: unused variable ‘j’ [-Wunused-variable] int i,nod1,nod2,cost,j; ^ user.c:9:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&m); ^ user.c:13:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d",&nod1,&nod2,&cost); ^ user.c: In function ‘main’: user.c:76:33: warning: ‘mid’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(f,"%.2f",(float)(mid-1)/100); ^