java - GPA Calculator Error - Variable might not been initialized? -
can please me through problem ?
/* author: m asad raza date: 18/03/2014 */ code:- import java.util.scanner; class gpacalculator { public static void main(string args[]) { scanner input = new scanner(system.in); double sub1,sub2,sub3,sub4,sub5,sub6,subtotal=100*6,obtained,gp; double gp1,gp2,gp3,gp4,gp5,gp6; string name; system.out.println(" \n***welcome gpa calculator***\n"); system.out.print("enter name: "); name=input.nextline(); system.out.println("\n**hello "+name+" :)\n"); system.out.print("enter subject#1 marks: "); sub1=input.nextint(); if(sub1>100){ system.out.println("marks exceeded limit.\ntry agian..!!"); system.exit(0); } if(sub1<45){ system.out.println("subject failed!!\ngpa can't calculated."); system.exit(0); } system.out.print("enter subject#2 marks: "); sub2=input.nextint(); if(sub2>100){ system.out.println("marks exceeded limit.\ntry agian..!!"); system.exit(0); } if(sub2<45){ system.out.println("subject failed!!\ngpa can't calculated."); system.exit(0); } system.out.print("enter subject#3 marks: "); sub3=input.nextint(); if(sub3>100){ system.out.println("marks exceeded limit.\ntry agian..!!"); system.exit(0); } if(sub3<45){ system.out.println("subject failed!!\ngpa can't calculated."); system.exit(0); } system.out.print("enter subject#4 marks: "); sub4=input.nextint(); if(sub4>100){ system.out.println("marks exceeded limit.\ntry agian..!!"); system.exit(0); } if(sub4<45){ system.out.println("subject failed!!\ngpa can't calculated."); system.exit(0); } system.out.print("enter subject#5 marks: "); sub5=input.nextint(); if(sub5>100){ system.out.println("marks exceeded limit.\ntry agian..!!"); system.exit(0); } if(sub5<45){ system.out.println("subject failed!!\ngpa can't calculated."); system.exit(0); } system.out.print("enter subject#6 marks: "); sub6=input.nextint(); if(sub6>100){ system.out.println("marks exceeded limit.\ntry agian..!!"); system.exit(0); } if(sub6<45){ system.out.println("subject failed!!\ngpa can't calculated."); system.exit(0); } //calculating gpa if(sub1>=85&&sub1<=100) { gp1=4.00; } if(sub1>=80&&sub1<=84) { gp1=3.70; } if(sub1>=75&&sub1<=79) { gp1=3.30; } if(sub1>=70&&sub1<=74) { gp1=3.00; } if(sub1>=65&&sub1<=69) { gp1=2.70; } if(sub1>=60&&sub1<=64) { gp1=2.30; } if(sub1>=55&&sub1<=59) { gp1=2.00; } if(sub1>=50&&sub1<=54) { gp1=1.70; } if(sub1>=45&&sub1<=49) { gp1=1.00; } //*****sub1 gp1 finished if(sub2>=85&&sub2<=100) { gp2=4.00; } if(sub2>=80&&sub2<=84) { gp2=3.70; } if(sub2>=75&&sub2<=79) { gp2=3.30; } if(sub2>=70&&sub2<=74) { gp2=3.00; } if(sub2>=65&&sub2<=69) { gp2=2.70; } if(sub2>=60&&sub2<=64) { gp2=2.30; } if(sub2>=55&&sub2<=59) { gp2=2.00; } if(sub2>=50&&sub2<=54) { gp2=1.70; } if(sub2>=45&&sub2<=49) { gp2=1.00; } //***** sub2 gp2 finished if(sub3>=85&&sub3<=100) { gp3=4.00; } if(sub3>=80&&sub3<=84) { gp3=3.70; } if(sub3>=75&&sub3<=79) { gp3=3.30; } if(sub3>=70&&sub3<=74) { gp3=3.00; } if(sub3>=65&&sub3<=69) { gp3=2.70; } if(sub3>=60&&sub3<=64) { gp3=2.30; } if(sub3>=55&&sub3<=59) { gp3=2.00; } if(sub3>=50&&sub3<=54) { gp3=1.70; } if(sub3>=45&&sub3<=49) { gp3=1.00; } //*****sub3 gp3 finished if(sub4>=85&&sub4<=100) { gp4=4.00; } if(sub4>=80&&sub4<=84) { gp4=3.70; } if(sub4>=75&&sub4<=79) { gp4=3.30; } if(sub4>=70&&sub4<=74) { gp4=3.00; } if(sub4>=65&&sub4<=69) { gp4=2.70; } if(sub4>=60&&sub4<=64) { gp4=2.30; } if(sub4>=55&&sub4<=59) { gp4=2.00; } if(sub4>=50&&sub4<=54) { gp4=1.70; } if(sub4>=45&&sub4<=49) { gp4=1.00; } //*****gp4 sub4 finished if(sub5>=85&&sub5<=100) { gp5=4.00; } if(sub5>=80&&sub5<=84) { gp5=3.70; } if(sub5>=75&&sub5<=79) { gp5=3.30; } if(sub5>=70&&sub5<=74) { gp5=3.00; } if(sub5>=65&&sub5<=69) { gp5=2.70; } if(sub5>=60&&sub5<=64) { gp5=2.30; } if(sub5>=55&&sub5<=59) { gp5=2.00; } if(sub5>=50&&sub5<=54) { gp5=1.70; } if(sub5>=45&&sub5<=49) { gp5=1.00; } //***** sub5 gp5 finished if(sub6>=85&&sub6<=100) { gp6=4.00; } if(sub6>=80&&sub6<=84) { gp6=3.70; } if(sub6>=75&&sub6<=79) { gp6=3.30; } if(sub6>=70&&sub6<=74) { gp6=3.00; } if(sub6>=65&&sub6<=69) { gp6=2.70; } if(sub6>=60&&sub6<=64) { gp6=2.30; } if(sub6>=55&&sub6<=59) { gp6=2.00; } if(sub6>=50&&sub6<=54) { gp6=1.70; } if(sub6>=45&&sub6<=49) { gp6=1.00; } //end calculating gpa obtained=sub1+sub2+sub3+sub4+sub5+sub6; gp=gp1+gp2+gp3+gp4+gp5+gp6; gp=gp/6; system.out.println("\n\n******information******\n"); system.out.println("total marks = "+subtotal+"\n"+"obtained marks = "+obtained+"\n"+"percentage = "+(obtained/subtotal)*100); system.out.println("gpa = "+gp); system.out.println("\n***********************"); } }
without further knowledge ( error example ... ) first guess line culprit.
double sub1,sub2,sub3,sub4,sub5,sub6,subtotal=100*6,obtained,gp; i think setting sub1,sub2,sub3,sub4,sub5,sub6 & subtotal 600, , leaving obtained , gp uninitialised. ( it's uncommon looking line of code )
if that's case, then
double gp1,gp2,gp3,gp4,gp5,gp6; is leaving these variable uninitialised.
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