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//Analyse the truss
//Refer fig. 4.20
//Consider equilibrium of entire truss
//taking moment about A
YE=(60*8-40*4)/4 //kN
XA=40 //kN
YA=60-80 //kN
//Take A as origin and determine co-ordinates of various point
//Lengths in m are
AB=4
CE=4
AE=4
ED=4
BE=4*sqrt(2)
CD=4*sqrt(2)
//Consider equilibrium of joints individually
//Joint A
tAB=5
FAB=tAB*AB //kN
tAE=-10
FAE=tAE*AE //kN
//Joint B
tBE=-5
FBE=tBE*BE //kN
tBC=10-tBE
BC=4
FBC=tBC*BC //kN
//Joint C
tCD=15
CD=4*sqrt(2)
FCD=15*4*sqrt(2) //kN The answer provided in the textbook is wrong
tCE=-15
FCE=tCE*CE //kN
//Joint D
tDE=-15
DE=4
FDE=tDE*DE //kN
printf("The forces in different members are:-\nAB=%.2d kN\nBC=%.2d kN\nCD=%.2d kN\nDE=%.2d kN\nEA=%.2d kN\nEC=%.2d kN\nEB=%.2d kN",FAB,FBC,FCD,FDE,FAE,FCE,FBE)
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