3.18 upload

.vs/ProjectSettings.json

@@ -0,0 +1,3 @@
+{
+  "CurrentProjectSetting": "x64-Debug"
+}

.vs/VSWorkspaceState.json

@@ -0,0 +1,13 @@
+{
+  "OutputFoldersPerTargetSystem": {
+    "\u672C\u5730\u8BA1\u7B97\u673A": [
+      "out\\build\\x64-Debug",
+      "out\\install\\x64-Debug"
+    ]
+  },
+  "ExpandedNodes": [
+    "",
+    "\\13"
+  ],
+  "PreviewInSolutionExplorer": false
+}

.vs/learn_c_primer.github.io/v17/DocumentLayout.json

@@ -0,0 +1,106 @@
+{
+  "Version": 1,
+  "WorkspaceRootPath": "C:\\Users\\TGSpock\\Documents\\GitHub\\learn_c_primer.github.io\\",
+  "Documents": [
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+      "RelativeMoniker": "D:0:0:{A2FE74E1-B743-11D0-AE1A-00A0C90FFFC3}|\u003CMiscFiles\u003E|solutionrelative:CMakeLists.txt||{8B382828-6202-11D1-8870-0000F87579D2}"
+    },
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+      "RelativeMoniker": "D:0:0:{A2FE74E1-B743-11D0-AE1A-00A0C90FFFC3}|\u003CMiscFiles\u003E|solutionrelative:13\\13.4.c||{D0E1A5C6-B359-4E41-9B60-3365922C2A22}"
+    },
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+      "RelativeMoniker": "D:0:0:{A2FE74E1-B743-11D0-AE1A-00A0C90FFFC3}|\u003CMiscFiles\u003E|solutionrelative:13\\13.3.c||{D0E1A5C6-B359-4E41-9B60-3365922C2A22}"
+    },
+    {
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+      "RelativeMoniker": "D:0:0:{A2FE74E1-B743-11D0-AE1A-00A0C90FFFC3}|\u003CMiscFiles\u003E|solutionrelative:13\\13.2.c||{D0E1A5C6-B359-4E41-9B60-3365922C2A22}"
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+    {
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+    }
+  ],
+  "DocumentGroupContainers": [
+    {
+      "Orientation": 0,
+      "VerticalTabListWidth": 256,
+      "DocumentGroups": [
+        {
+          "DockedWidth": 200,
+          "SelectedChildIndex": 0,
+          "Children": [
+            {
+              "$type": "Document",
+              "DocumentIndex": 0,
+              "Title": "CMakeLists.txt",
+              "DocumentMoniker": "C:\\Users\\TGSpock\\Documents\\GitHub\\learn_c_primer.github.io\\CMakeLists.txt",
+              "RelativeDocumentMoniker": "CMakeLists.txt",
+              "ToolTip": "C:\\Users\\TGSpock\\Documents\\GitHub\\learn_c_primer.github.io\\CMakeLists.txt",
+              "RelativeToolTip": "CMakeLists.txt",
+              "ViewState": "AQIAAAAAAAAAAAAAAAAQwAcAAAAOAAAA",
+              "Icon": "ae27a6b0-e345-4288-96df-5eaf394ee369.003109|",
+              "WhenOpened": "2024-03-14T10:55:32.027Z",
+              "IsPinned": true,
+              "EditorCaption": ""
+            },
+            {
+              "$type": "Document",
+              "DocumentIndex": 1,
+              "Title": "13.4.c",
+              "DocumentMoniker": "C:\\Users\\TGSpock\\Documents\\GitHub\\learn_c_primer.github.io\\13\\13.4.c",
+              "RelativeDocumentMoniker": "13\\13.4.c",
+              "ToolTip": "C:\\Users\\TGSpock\\Documents\\GitHub\\learn_c_primer.github.io\\13\\13.4.c",
+              "RelativeToolTip": "13\\13.4.c",
+              "ViewState": "AQIAAAYAAAAAAAAAAAAAABgAAAAeAAAA",
+              "Icon": "ae27a6b0-e345-4288-96df-5eaf394ee369.000423|",
+              "WhenOpened": "2024-03-17T15:32:19.207Z",
+              "EditorCaption": ""
+            },
+            {
+              "$type": "Document",
+              "DocumentIndex": 2,
+              "Title": "13.3.c",
+              "DocumentMoniker": "C:\\Users\\TGSpock\\Documents\\GitHub\\learn_c_primer.github.io\\13\\13.3.c",
+              "RelativeDocumentMoniker": "13\\13.3.c",
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+              "Icon": "ae27a6b0-e345-4288-96df-5eaf394ee369.000423|",
+              "WhenOpened": "2024-03-15T06:08:22.529Z",
+              "EditorCaption": ""
+            },
+            {
+              "$type": "Document",
+              "DocumentIndex": 4,
+              "Title": "13.1.c",
+              "DocumentMoniker": "C:\\Users\\TGSpock\\Documents\\GitHub\\learn_c_primer.github.io\\13\\13.1.c",
+              "RelativeDocumentMoniker": "13\\13.1.c",
+              "ToolTip": "C:\\Users\\TGSpock\\Documents\\GitHub\\learn_c_primer.github.io\\13\\13.1.c",
+              "RelativeToolTip": "13\\13.1.c",
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+              "Icon": "ae27a6b0-e345-4288-96df-5eaf394ee369.000423|",
+              "WhenOpened": "2024-03-15T05:54:29.157Z",
+              "EditorCaption": ""
+            },
+            {
+              "$type": "Document",
+              "DocumentIndex": 3,
+              "Title": "13.2.c",
+              "DocumentMoniker": "C:\\Users\\TGSpock\\Documents\\GitHub\\learn_c_primer.github.io\\13\\13.2.c",
+              "RelativeDocumentMoniker": "13\\13.2.c",
+              "ToolTip": "C:\\Users\\TGSpock\\Documents\\GitHub\\learn_c_primer.github.io\\13\\13.2.c",
+              "RelativeToolTip": "13\\13.2.c",
+              "ViewState": "AQIAACQAAAAAAAAAAAAAABwAAAAaAAAA",
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+              "EditorCaption": ""
+            }
+          ]
+        }
+      ]
+    }
+  ]
+}

.vs/tasks.vs.json

@@ -0,0 +1,10 @@
+{
+  "version": "0.2.1",
+  "tasks": [
+    {
+      "taskLabel": "\u4EFB\u52A1-learn_c_primer.github",
+      "appliesTo": "/",
+      "type": "launch"
+    }
+  ]
+}

13/13.1.c

@@ -0,0 +1,38 @@
+#include <stdio.h>
+#include <stdlib.h>
+int main (int argc, char * argv[])
+{
+	int ch;
+	FILE * fp;
+	unsigned long count =0;
+
+	if (argc != 2)
+	{
+		printf ("usage: %s filename\n", argv[0]);
+		exit (EXIT_FAILURE);
+	}
+	else;
+
+	if (!(fp = fopen(argv[1], "r")))
+	{
+		printf ("can't open %s\n", argv[1]);
+		exit (EXIT_FAILURE);
+	}
+	else;
+
+	while ((ch = getc(fp)) != EOF)
+	{
+		putc (ch, stdout);
+		count ++;
+	}
+
+	if (fclose(fp))
+	{
+		printf("error in closing file %s\n", argv[1]);
+	}
+	else;
+
+	printf ("file %s has %lu characters\n", argv[1], count);
+
+	return 0;
+}

13/13.2.c

@@ -0,0 +1,54 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#define LEN 40
+
+int main (int argc, char * argv[])
+{
+    FILE * in, * out;
+    int ch;
+    char name[LEN];
+    int count = 0;
+
+    if (argc < 2)
+    {
+        fprintf (stderr, "usage: %s filename\n", argv[0]);
+        exit (EXIT_FAILURE);
+    }
+    else;
+
+    if (!(in = fopen (argv[1], "r")))
+    {
+        fprintf (stderr, "i couldn't open the file \"%s\"\n", argv[1]);
+        exit (EXIT_FAILURE);
+    }
+    else;
+
+    strncpy (name, argv[1], LEN - 5);
+    name[LEN - 5] = '\0';
+    strcat (name, ".red");
+
+    if (!(out = fopen (name, "w")))
+    {
+        fprintf (stderr, "can't create oupput file. \n");
+        exit (3);
+    }
+    else;
+
+    while ((ch = getc(in)) != EOF)
+    {
+        if (count ++ % 3 == 0)
+        {
+            putc (ch, out);
+        }
+        else;
+    }
+
+    if (fclose(in) || fclose(out))
+    {
+        fprintf(stderr, "error in closing files. \n");
+    }
+    else;
+
+    return 0;
+}

13/13.3.c

@@ -0,0 +1,46 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#define MAX 41
+
+int main(void)
+{
+	FILE * fp;
+	char word[MAX];
+
+	//fopen()第二个参数作用: 
+	//单独使用r时为只读, 单独使用w或a时为只写. 
+	//r+会把指针摆到开头写, w+会把文件清空写, a+会接着文件屁股写. 
+	//例如 源文件: 012345678  输入:910jq   
+	//r+输出: 910jq5678  w+输出: 910jq  a+输出: 012345678910jq  
+	if(!(fp = fopen("wordy", "a+")))
+	{
+		fprintf(stdout, "Can't open \"wordy\" file. \n");
+		exit(EXIT_FAILURE);
+	}
+	else;
+
+	puts("Enter words to add to the file; press the #");
+	puts("key at the beginning of a line to terminate.");
+
+	while((fscanf(stdin, "%40s", word)) && (word[0] != '#'))
+	{
+		fprintf(fp, "%s\n", word);
+	}
+
+	puts("File contents: ");
+	rewind(fp);
+
+	while(fscanf(fp, "%s", word) == 1)
+	{
+		puts(word);
+	}
+
+	if (fclose(fp))
+	{
+		fprintf(stderr, "error closing file\n");
+	}
+	else;
+
+	return 0;
+}

13/13.4.c

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <stdlib.h>
+#define CTRL_Z '\032'
+#define SLEN 81
+int main(void)
+{
+	char file[SLEN];
+	char ch;
+	FILE * fp;
+	long count, last;
+
+	fputs("Enter the name of file to be processed: \n", stdout);
+	scanf("%80s", file);
+	if(!(fp = fopen(file, "rb")))
+	{
+		printf("revers can't open %s\n", file);
+		exit(EXIT_FAILURE);
+	}
+
+	fseek(fp, 0L, SEEK_END);
+	last = ftell(fp);
+
+	for (count = 1L; count <= last; count++)
+	{
+		fseek(fp, -count, SEEK_END);
+		ch = getc(fp);
+		if (ch != CTRL_Z && ch != '\r')
+		{
+			putchar(ch);
+		}
+	}
+
+	putchar('\n');
+	fclose(fp);
+
+	return 0;
+}

13/test132

@@ -0,0 +1 @@
+So even Eddy came oven ready.

13/test132.red

@@ -0,0 +1 @@
+Send money

CMakeLists.txt

@@ -6,8 +6,5 @@ set(CMAKE_CXX_STANDARD 14)
 include_directories(9)
 
 add_executable(
-        C_primer
-        12/12.25.c
-        12/s_gets.c
-        12/s_gets.h
+        C_primer  "13/13.4.c"
 )

CMakeSettings.json

@@ -0,0 +1,15 @@
+{
+  "configurations": [
+    {
+      "name": "x64-Debug",
+      "generator": "Ninja",
+      "configurationType": "Debug",
+      "inheritEnvironments": [ "msvc_x64_x64" ],
+      "buildRoot": "${projectDir}\\out\\build\\${name}",
+      "installRoot": "${projectDir}\\out\\install\\${name}",
+      "cmakeCommandArgs": "",
+      "buildCommandArgs": "",
+      "ctestCommandArgs": ""
+    }
+  ]
+}