From 17dc6b7f8ecab90290f4a08a58b35bdbb65667f5 Mon Sep 17 00:00:00 2001
From: gaomei <gaomei@finalfrontier.cn>
Date: Sat, 4 Jan 2025 19:40:58 +0800
Subject: [PATCH 1/4] fix 6.4 example

---
 latex_src/little_languages.tex | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/latex_src/little_languages.tex b/latex_src/little_languages.tex
index 39afc37..9b6e633 100644
--- a/latex_src/little_languages.tex
+++ b/latex_src/little_languages.tex
@@ -675,6 +675,7 @@ \section{逆波兰式计算器}
     {   for (i = 1; i <= NF; i++)
             if ($i ~ /^[+-]?([0-9]+[.]?[0-9]*|[.][0-9]+)$/) {
                 stack[++top] = $i
+                continue
             } else if ($i == "+" && top > 1) {
                 stack[top-1] += stack[top]; top--
             } else if ($i == "-" && top > 1) {
@@ -690,8 +691,8 @@ \section{逆波兰式计算器}
                 top = 0
                 next
             }
-        if (top == 1)
-            printf("\t%.8g\n", stack[top--])
+        if (top == 1 && i == NF)
+            printf("\t%.8g\n", stack[top])
         else if (top > 1) {
             printf("error: too many operands\n")
             top = 0
@@ -730,6 +731,7 @@ \section{逆波兰式计算器}
     { for (i = 1; i <= NF; i++)
           if ($i ~ /^[+-]?([0-9]+[.]?[0-9]*|[.][0-9]+)$/) {
               stack[++top] = $i
+              continue
           } else if ($i == "+" && top > 1) {
               stack[top-1] += stack[top]; top--
           } else if ($i == "-" && top > 1) {
@@ -763,8 +765,8 @@ \section{逆波兰式计算器}
               top = 0
               next
           }
-      if (top == 1 && $NF !~ /\=$/)
-          printf("\t%.8g\n", stack[top--])
+      if (top == 1 && i == NF && $NF !~ /\=$/)
+          printf("\t%.8g\n", stack[top])
       else if (top > 1) {
           printf("error: too many operands\n")
           top = 0

From c895398204aed29aea614c4f5d66ea63a6549ece Mon Sep 17 00:00:00 2001
From: gaomei <gaomei@finalfrontier.cn>
Date: Sat, 4 Jan 2025 19:58:51 +0800
Subject: [PATCH 2/4] fix 6.4 example more line srcfile

---
 latex_src/little_languages.tex | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/latex_src/little_languages.tex b/latex_src/little_languages.tex
index 9b6e633..b05eb9b 100644
--- a/latex_src/little_languages.tex
+++ b/latex_src/little_languages.tex
@@ -692,7 +692,7 @@ \section{逆波兰式计算器}
                 next
             }
         if (top == 1 && i == NF)
-            printf("\t%.8g\n", stack[top])
+            printf("\t%.8g\n", stack[top--])
         else if (top > 1) {
             printf("error: too many operands\n")
             top = 0
@@ -766,7 +766,7 @@ \section{逆波兰式计算器}
               next
           }
       if (top == 1 && i == NF && $NF !~ /\=$/)
-          printf("\t%.8g\n", stack[top])
+          printf("\t%.8g\n", stack[top--])
       else if (top > 1) {
           printf("error: too many operands\n")
           top = 0

From 3f48820208482c86673595d6ea2542cc07e93e63 Mon Sep 17 00:00:00 2001
From: gaomei <gaomei@finalfrontier.cn>
Date: Tue, 7 Jan 2025 20:05:22 +0800
Subject: [PATCH 3/4] fix 6.4 example (delete continue)

---
 latex_src/little_languages.tex | 2 --
 1 file changed, 2 deletions(-)

diff --git a/latex_src/little_languages.tex b/latex_src/little_languages.tex
index b05eb9b..9170f5f 100644
--- a/latex_src/little_languages.tex
+++ b/latex_src/little_languages.tex
@@ -675,7 +675,6 @@ \section{逆波兰式计算器}
     {   for (i = 1; i <= NF; i++)
             if ($i ~ /^[+-]?([0-9]+[.]?[0-9]*|[.][0-9]+)$/) {
                 stack[++top] = $i
-                continue
             } else if ($i == "+" && top > 1) {
                 stack[top-1] += stack[top]; top--
             } else if ($i == "-" && top > 1) {
@@ -731,7 +730,6 @@ \section{逆波兰式计算器}
     { for (i = 1; i <= NF; i++)
           if ($i ~ /^[+-]?([0-9]+[.]?[0-9]*|[.][0-9]+)$/) {
               stack[++top] = $i
-              continue
           } else if ($i == "+" && top > 1) {
               stack[top-1] += stack[top]; top--
           } else if ($i == "-" && top > 1) {

From a04c1b57a952280bf4804c6867f232c68c0af20c Mon Sep 17 00:00:00 2001
From: gaomei <gaomei@finalfrontier.cn>
Date: Tue, 7 Jan 2025 20:08:22 +0800
Subject: [PATCH 4/4] fix 6.4 example

---
 latex_src/little_languages.tex | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/latex_src/little_languages.tex b/latex_src/little_languages.tex
index 9170f5f..291bda1 100644
--- a/latex_src/little_languages.tex
+++ b/latex_src/little_languages.tex
@@ -729,7 +729,7 @@ \section{逆波兰式计算器}
 
     { for (i = 1; i <= NF; i++)
           if ($i ~ /^[+-]?([0-9]+[.]?[0-9]*|[.][0-9]+)$/) {
-              stack[++top] = $i
+              stack[++top] = $i 
           } else if ($i == "+" && top > 1) {
               stack[top-1] += stack[top]; top--
           } else if ($i == "-" && top > 1) {