11.9 update

11/11.xcodeproj/project.pbxproj

@@ -7,7 +7,7 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
-		7AF5A9D92B3958EC00A0A48F /* 11.1.c in Sources */ = {isa = PBXBuildFile; fileRef = 7AF5A9D82B3958EC00A0A48F /* 11.1.c */; };
+		7AEAEA532B4CE61B00FF61E5 /* 11.15.c in Sources */ = {isa = PBXBuildFile; fileRef = 7AEAEA522B4CE61B00FF61E5 /* 11.15.c */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXCopyFilesBuildPhase section */
@@ -23,8 +23,8 @@
 /* End PBXCopyFilesBuildPhase section */
 
 /* Begin PBXFileReference section */
+		7AEAEA522B4CE61B00FF61E5 /* 11.15.c */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.c; path = 11.15.c; sourceTree = "<group>"; };
 		7AF5A9CE2B39588F00A0A48F /* 11 */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = 11; sourceTree = BUILT_PRODUCTS_DIR; };
-		7AF5A9D82B3958EC00A0A48F /* 11.1.c */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.c; path = 11.1.c; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -57,7 +57,7 @@
 		7AF5A9D02B39588F00A0A48F /* 11 */ = {
 			isa = PBXGroup;
 			children = (
-				7AF5A9D82B3958EC00A0A48F /* 11.1.c */,
+				7AEAEA522B4CE61B00FF61E5 /* 11.15.c */,
 			);
 			path = 11;
 			sourceTree = "<group>";
@@ -119,7 +119,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				7AF5A9D92B3958EC00A0A48F /* 11.1.c in Sources */,
+				7AEAEA532B4CE61B00FF61E5 /* 11.15.c in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

11/11/11.10.c

@@ -0,0 +1,29 @@
+#include <stdio.h>
+int main (void)
+{
+	char words[10];
+	int i = 0;
+
+	puts ("Enter strings(empty line to quit):");
+	while (fgets (words, 10, stdin) != NULL && words[0] != '\n')
+	{
+		while (words[i] != '\n' && words[i] != '\0')
+		{
+			i ++;
+		}
+		if (words[i] == '\n')
+		{
+			words[i] = '\0';
+		}else
+		{
+			while (getchar() != '\n')
+			{
+				continue;
+			}
+		}
+		puts (words);
+	}
+	puts ("done");
+
+	return 0;
+}

11/11/11.11.c

@@ -0,0 +1,19 @@
+//
+//  11.11.c
+//  11
+//
+//  Created by T G Spock on 2024/1/8.
+//
+
+#include <stdio.h>
+int main (void)
+{
+    char name1[11], name2[11];
+    int count;
+
+    printf ("Please enter 2 names.\n");
+    count = scanf ("%5s %10s", name1, name2);
+    printf ("I read %d names %s and %s.\n", count, name1, name2);
+
+    return 0;
+}

11/11/11.12.c

@@ -0,0 +1,23 @@
+//
+//  11.12.c
+//  11
+//
+//  Created by T G Spock on 2024/1/8.
+//
+
+#include <stdio.h>
+#define DEF "I am a #defined string."
+int main (void)
+{
+    char str1[80] = "An array was initialized to me. ";
+    const char *str2 = "A pointer was initialized to me. ";
+
+    puts ("I am an argument to puts(). ");
+    puts (DEF);
+    puts (str1);
+    puts (str2);
+    puts (&str1[5]);
+    puts (str2 +4);
+
+    return 0;
+}

11/11/11.13.c

@@ -0,0 +1,19 @@
+//
+//  11.13.c
+//  11
+//
+//  Created by T G Spock on 2024/1/8.
+//
+
+#include <stdio.h>
+int main (void)
+{
+    char side_a[] = "Side A";
+    char dont[] = {'W', 'O', 'W', '!'};
+    char side_b[] = "Side B";
+
+    printf ("side_a = %p, dont = %p, side_b[] = %p\n", side_a, dont, side_b);
+    puts (dont);
+
+    return 0;
+}

11/11/11.14.c

@@ -0,0 +1,28 @@
+//
+//  11.14.c
+//  11
+//
+//  Created by T G Spock on 2024/1/8.
+//
+
+#include <stdio.h>
+int main (void)
+{
+    char line[8];
+    int i;
+
+    printf ("Now puts() speaking: \n");
+    while (gets (line) && line[0] != EOF)
+    {
+        i = 0;
+        puts (line);
+    }
+    printf ("Now fputs() speaking: \n");
+    while (fgets (line, 8, stdin) && line[0] != '\n')
+    {
+        i = 0;
+        fputs (line, stdout);
+    }
+
+    return 0;
+}

11/11/11.15.c

@@ -0,0 +1,8 @@
+//
+//  11.15.c
+//  11
+//
+//  Created by T G Spock on 2024/1/9.
+//
+
+#include <stdio.h>

11/11/11.2.c

@@ -0,0 +1,14 @@
+//
+//  11.2.c
+//  11
+//
+//  Created by T G Spock on 2024/1/2.
+//
+
+#include <stdio.h>
+int main (void)
+{
+    printf ("%s, %p, %c\n", "We", "are", *"space farers");
+
+    return 0;
+}

11/11/11.3.c

@@ -0,0 +1,22 @@
+//
+//  11.3.c
+//  11
+//
+//  Created by T G Spock on 2024/1/2.
+//
+
+#define MSG "I'm special"
+#include <stdio.h>
+int main (void)
+{
+    char ar[] = MSG;
+    const char * pt = MSG;
+
+    printf ("address of \"I'm special\": %p \n", "I'm special");
+    printf ("              address ar: %p \n", ar);
+    printf ("              address pt: %p \n", pt);
+    printf ("          address of MSG: %p \n", MSG);
+    printf ("address of \"I'm special\": %p \n", "I'm special");
+
+    return 0;
+}

11/11/11.4.c

@@ -0,0 +1,60 @@
+//
+//  11.4.c
+//  11
+//
+//  Created by T G Spock on 2024/1/2.
+//
+
+#include <stdio.h>
+int main (void)
+{
+    char heart[] = "I love A";
+    const char * head = "I love B";
+    const char * spare;
+
+    printf ("address heart = %p\n", heart);
+    printf ("address head = %p\n", head);
+    printf ("address spare = %p\n", spare);
+    for (int i = 0; i < 8; i ++)
+    {
+        putchar (heart[i]);
+    }
+    putchar ('\n');
+    for (int i = 0; i < 8; i ++)
+    {
+        putchar (head[i]);
+    }
+    putchar ('\n');
+    for (int i = 0; i < 8; i ++)
+    {
+        putchar (*(heart + i));
+    }
+    putchar ('\n');
+    for (int i = 0; i < 8; i ++)
+    {
+        putchar (*(head + i));
+    }
+    putchar ('\n');
+    while (*(head) != '\0')
+    {
+        putchar (*(head++));
+    }
+    putchar ('\n');
+    printf ("address head b4 = %p \n", head);
+    head = heart;
+    printf ("address head aft = %p \n", head);
+    for (int i = 0; i < 8; i ++)
+    {
+        putchar (head[i]);
+    }
+    putchar ('\n');
+    printf ("now spare working. \n");
+    spare = 0x100003f27;
+    for (int i = 0; i < 8; i ++)
+    {
+        putchar (spare[i]);
+    }
+    putchar ('\n');
+
+    return 0;
+}

11/11/11.5.c

@@ -0,0 +1,41 @@
+//
+//  11.5.c
+//  11
+//
+//  Created by T G Spock on 2024/1/3.
+//
+
+#include <stdio.h>
+#define SLEN 40
+#define LIM 5
+int main (void)
+{
+    const char * myTalents[LIM] =
+    {
+        "Adding numbers swiftly",
+        "Multiplying accurately",
+        "Stashing data",
+        "Following instructions to the letter",
+        "Understanding C language"
+    };
+    char yourTalents[LIM][SLEN] =
+    {
+        "Walking in a strait line",
+        "Sleeping",
+        "Watching television",
+        "Mailing letters",
+        "Reading mail"
+    };
+    int i;
+
+    puts ("Let's compare talents. ");
+    printf ("%-36s %-25s\n", "My talents", "Your talents");
+    for (i = 0; i < LIM; i ++)
+    {
+        printf ("%-36s %-25s\n", myTalents[i], yourTalents[i]);
+    }
+    putchar ('\n');
+    printf ("Size of myTalents: %zd, size of yourTalents: %zd \n", sizeof (myTalents), sizeof (yourTalents));
+
+    return 0;
+}

11/11/11.6.c

@@ -0,0 +1,19 @@
+//
+//  11.6.c
+//  11
+//
+//  Created by T G Spock on 2024/1/3.
+//
+
+#include <stdio.h>
+int main (void)
+{
+    const char * mesg = "Don't be a fool";
+    const char * copy;
+
+    printf ("&copy = %p\n", &copy);
+    copy = mesg;
+    printf ("%s \n", copy);
+    printf ("mesg = %s, &mesg = %p, value of mesg = %p\n", mesg, &mesg, mesg);
+    printf ("cpoy = %s, &copy = %p, value of copy = %p\n", mesg, &mesg, mesg);
+}

11/11/11.7.c

@@ -0,0 +1,22 @@
+//
+//  11.7.c
+//  11
+//
+//  Created by T G Spock on 2024/1/3.
+//
+
+#include <stdio.h>
+#define STLEN 81
+int main (void)
+{
+    char words[STLEN];
+
+    puts ("Enter a string, please. ");
+    gets (words);
+    printf ("Your string twice: \n");
+    printf ("%s \n", words);
+    puts (words);
+    puts ("Done. ");
+
+    return 0;
+}

11/11/11.8.c

@@ -0,0 +1,26 @@
+//
+//  11.8.c
+//  11
+//
+//  Created by T G Spock on 2024/1/5.
+//
+
+#include <stdio.h>
+#define STLEN 14
+int main (void)
+{
+	char words[STLEN]; 
+
+	puts ("Enter a string,please.");
+	fgets (words, STLEN, stdin);
+	printf ("Your string twice (puts(), then fputs()): \n");
+	puts (words);
+	fputs (words, stdout);
+	puts ("Enter another string, please.");
+	fgets (words, STLEN, stdin);
+	puts (words);
+	fputs (words, stdout);
+	puts ("Done");
+
+	return 0;
+}

11/11/11.9.c

@@ -0,0 +1,16 @@
+#include <stdio.h>
+#define STLEN 10
+//this programme will quit if enter a string which % 9 == 0
+int main (void)
+{
+	char words[STLEN];
+
+	puts ("Enter strings (empty line to quit)");
+	while (fgets (words, STLEN, stdin) != NULL && words[0] != '\n')
+	{
+		fputs (words, stdout);
+	}
+	puts ("Done");
+
+	return 0;
+}