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+clc; funcprot(0);
+//Example 9.3 Horseshoe Vortex  
+
+// Initialisation of variables
+T = 250;
+
+// Calculations
+function[y] =Velocity(R, theta1, theta2)
+    y = (T/(4*%pi*R))*(cos(theta1)-cos(theta2))
+endfunction
+//Considering Leg AB
+    theta1 = 0;                //From figure
+    theta2 = %pi - atan(4/5);  //From figure 
+    R = 4;                     //From figure
+    Vt1 = Velocity(R, theta1, theta2);
+    
+//Considering Leg BC
+    theta1 = atan(5/4);                //From figure
+    theta2 = %pi - atan(5/6);       //From figure 
+    R = 5;                     //From figure
+    Vt2 = Velocity(R, theta1, theta2);
+
+//Considering Leg CD
+    theta1 = atan(5/6);                //From figure
+    theta2 = %pi;       //From figure 
+    R = 6;                     //From figure
+    Vt3 = Velocity(R, theta1, theta2);
+
+Vt = Vt1 + Vt2 + Vt3;
+ 
+//Results 
+disp(Vt,"Velocity at point P (ft/sec):",Vt3,"Velocity due to leg CD (ft/sec):",Vt2,"Velocity due to leg BC (ft/sec):",Vt1,"Velocity due to leg AB (ft/sec):");