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diff --git a/1088/CH24/EX24.7/Example7.sce b/1088/CH24/EX24.7/Example7.sce
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+++ b/1088/CH24/EX24.7/Example7.sce
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+clear
+flag=1
+mode(-1)
+clc
+
+printf("Example 7    :    Show the effect of using the execv series \n")
+disp("****************************************************************")
+disp("Answer    :   ")
+disp("INSTRUCTIONS   : ")
+halt(' ')
+disp("1.These programs are part of systems programming PURELY in Unix and the commands have NO EQUIVALENT IN SCILAB")
+halt(' ')
+disp("2.However the .c files which are displayed here are also made into a seperate file.If you are a unix user then try compiling and running the programme with gcc or cc compiler")
+halt(' ')
+disp("3.The outputs displayed here are just MOCK OUTPUTS which are DISPLAYED IN THE TEXTBOOK")
+halt(' ')
+disp("4.The inconvenience is regretted.")
+halt('.............Press [ENTER] to continue.....')
+halt("")
+clc
+printf("\tUNIX SHELL SIMULATOR(DEMO VERSION WITH PRELOADED COMMANDS)\n\n\n")
+i=0
+i=i+1;f(i)='/* Program: execv.c -- Stuffs all command line arguments to an an array to be used with execv */'
+i=i+1;f(i)=''
+i=i+1;f(i)='#include <stdio.h>'
+i=i+1;f(i)='int main(int argc, char **argv) {'
+i=i+1;f(i)='    char *cmdargs[] = { '+ascii(34)+'grep'+ascii(34)+', '+ascii(34)+'-i'+ascii(34)+', '+ascii(34)+'-n'+ascii(34)+', '+ascii(34)+'SUMIT'+ascii(34)+', '+ascii(34)+'/etc/passwd'+ascii(34)+', NULL };'
+i=i+1;f(i)='    execv('+ascii(34)+'/bin/grep'+ascii(34)+', cmdargc);          /* Execute another program*/'
+i=i+1;f(i)='    printf('+ascii(34)+'execv error\n'+ascii(34)+');'
+i=i+1;f(i)='}'
+n=i;
+
+    
+
+printf("\n\n$ cat execv.c      # to open the file emp.lst")
+halt(' ')
+u=mopen('execv.c','wt')
+for i=1:n
+    mfprintf(u,"%s\n",f(i))
+    printf("%s\n",f(i))
+end
+mclose(u)
+halt('')
+clc
+
+halt(' ')
+ printf("$ cc execv.c")
+ halt(' ')
+ printf("$ a.out                      ")
+ halt(' ')
+ printf("15:sumit:x:102:10::/users1/home/staff/sumit:/usr/bin/bash")
+ halt(' ')
+
+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)
+
+