MSEE
Midterm exam

# Midterm exam - Midterm exam 1#This program finds repeated...

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Midterm exam 1. #This program finds repeated words in an input file and prints the repeated word and the line number on which it was found \$i = 0; while (<STDIN>) { \$a[\$i]=\$_; \$i++; \$hash {\$_}++; } foreach \$x(keys (%hash)) { if (\$hash{\$x} != 1) { print("\n\$x --- \$hash{\$x} Times"); \$i = 0; foreach(@a) { if(\$x eq \$a[\$i]) { \$ii = \$i + 1; print("\nat line \$ii"); } \$i++; } } print("\n"); } 2. #write a variance program

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use strict; use warnings; my @x = " "; my \$n = 100; for(my \$i=0;\$i<\$n;\$i++) { my \$rand = int(rand(10)+10); \$x[\$i] = \$rand; } sub mean() { my \$sum = 0; foreach(@x) { \$sum = \$sum + \$_; } \$sum = \$sum / \$n; return \$sum; } my \$m = mean(); print("Mean :: \$m\n"); sub Var() { my \$sum = 0; foreach(@x) { \$sum = \$sum + ((\$_-\$m)*(\$_-\$m)); } \$sum = \$sum/(\$n-1); return \$sum; } my \$var = Var();
print("Varience :: \$var\n"); sub SD() { my \$sd=sqrt(\$var); return \$sd; } my \$Sd = SD(); print("Standard Deviation :: \$Sd\n"); 3. # Count and Sort command using Command line argument

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Unformatted text preview: sub Count() { open (f1,"<\$ARGV[0]")||die("Please enter valid file name. ...!!!!\n"); print("::: Command Count :::\n"); @a = " "; \$i = 0; while (<f1>) { \$a[\$i]=\$_; \$i++; \$hash {\$_}++; } foreach \$x(keys (%hash)) { if (\$hash{\$x} != 1) { print("\n\$x --- \$hash{\$x} Times"); \$i = 0; foreach(@a) { if(\$x eq \$a[\$i]) { \$ii = \$i + 1; print("\nat line \$ii"); } \$i++; } } print("\n"); } close(f1); } sub Sort() { open (f1,"<\$ARGV[0]")||die("Please enter valid file name. ...!!!!\n"); @file = <f1>; @sorted = sort { \$a cmp \$b } @file; print("::: Command Sort :::\n"); print @sorted; close(f1); } #open (f1,"<\$ARGV[0]")||die("Please enter valid file name. ...!!!!\n"); \$cmd = \$ARGV[1]; if(\$cmd eq "count") { Count(); } elsif(\$cmd eq "sort") { Sort(); } elsif(\$cmd eq "both") { Count(); Sort(); } else{print("Please enter valid command. ..!!!\n");}...
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• Spring '10
• alex
• Subroutine, #, Enter key, #open, #This

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