update

4/suits.sh

@@ -27,7 +27,7 @@ function deal_cards() {
 }
 
 function main() {
-  card_idx=$(seed_random 0 51)
+  local card_idx=$(seed_random 0 51)
   printf "first one: "
   deal_cards "$card_idx" 0 13
   printf "\nsecond one: "

5/file.sh

@@ -1 +1,9 @@
 # (1)
+tail -n +23 file.txt | head -n 1
+sed -n '23p' file.txt
+awk 'NR==23' file.txt
+
+# (2)
+awk '{for(i=1;i<=NF;i++) num[$i]++;} END{ for(k in num) print k" "num[k]}' file.txt | sort -rnk 2
+
+# (3)

8/function.h

@@ -0,0 +1,6 @@
+#ifndef FUNCTION_H
+#define FUNCTION_H
+
+
+
+#endif

8/main.cpp

@@ -0,0 +1,5 @@
+#include "function.h"
+
+int main(int argc, char **argv) {
+  
+}