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+                //Programming Example 7.9

+//determine the largest of three integer quantities

+

+function[z] = maximum(x ,y)

+    if (x >= y) then

+        z = x;

+    else

+        z = y;

+    end

+endfunction

+

+function[] = main()

+//read the integer quantities

+printf("\nEnter integer quantities ");

+    printf("\na= ");

+    a= scanf("%d");

+    printf("\nb= ");

+    b= scanf("%d");

+    printf("\nc= ");

+    c= scanf("%d");

+//calculate and display the maximum value

+    d = maximum(a,b);

+    printf("\n\nmaximum = %d ", maximum(c,d));

+endfunction

+

+//calling main function.

+main();