initial commit / add all books

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diff --git a/1088/CH4/EX4.7/Example7.sce b/1088/CH4/EX4.7/Example7.sce
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+++ b/1088/CH4/EX4.7/Example7.sce
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+mode(-1)
+clear
+clc
+
+disp("Example 7    :               Show the use of the file command ls for long listing of files")
+disp("****************************************************************")
+disp("Answer    :   ")
+disp("INSTRUCTIONS   : ")
+printf("\nHere all instructions are preloaded in the form of a demo\nPRESS ENTER AFTER EACH COMMAND to see its RESULT\nPRESS ENTER AFTER EACH RESULT TO GO TO THE NEXT COMMAND\n")
+halt('.............Press [ENTER] to continue.....')
+halt("")
+clc
+printf("\tUNIX SHELL SIMULATOR(DEMO VERSION WITH PRELOADED COMMANDS)\n\n\n")
+printf("\n\n$ ls                        #To get the files and directories present in the current directory\n\n")
+halt("........# (hit [ENTER] for result)")
+mode(0)
+ls
+mode(-1)
+printf("\tUNIX SHELL SIMULATOR(DEMO VERSION WITH PRELOADED COMMANDS)\n\n\n")
+printf("\n\n$ ls  -l                       #To get the files and directories present in the current directory\n\n")
+halt("........# (hit [ENTER] for result)")
+mode(0)
+powershell('ls')
+mode(-1)
+halt("........# (hit [ENTER] for next instruction)")
+printf("\n\n\n$ exit        #To exit the current simulation terminal and return to Scilab console\n\n")
+halt("........# (hit [ENTER] for result)")
+//clc()
+printf("\n\n\t\t\tBACK TO SCILAB CONSOLE...\nLoading initial environment')
+sleep(1000)
+