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+//Chapter 6, Example 6.11, page 262
+clc
+//Initialisation
+p1=20                                    //transmitter power
+g=6                                       //gain
+h1=20                                    //height in metre
+
+//Calculation
+ct=p1/10                                  //Power gain
+ch=(h1*30**-1)**2                         //height gain
+cg=g*4**-1                                //antenna gain
+co=10*log10(ct*ch*cg)                //Total effects
+
+//Results
+printf("(1) Power gain, Ct = %.f",ct)
+printf("\n    Height gain = %.2f",ch)
+printf("\n    Antenna gain = %.1f",cg)
+printf("\n(2) Total effects = %.2f dB",co)