Lec 1 (cintro) import

Lec1/Makefile

+# CSCI 206 Computer Organization & Programming
+# Makefile for the introduction to C lectures
+#
+# Author: L. Felipe Perrone
+# Date: 2011-08-24
+#
+# Copyright (c) 2011 Bucknell University
+#
+# Permission is hereby granted, free of charge, to any individual or
+# institution obtaining a copy of this software and associated
+# documentation files (the "Software"), to use, copy, modify, and
+# distribute without restriction, provided that this copyright and
+# permission notice is maintained, intact, in all copies and supporting
+# documentation.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL BUCKNELL UNIVERSITY BE LIABLE FOR ANY CLAIM, DAMAGES
+# OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+# OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
+# OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+
+CFLAGS = -std=gnu99 -Wall -g 
+
+EXECS = first second third fourth fifth sixth seventh eighth ninth thirdA thirdB thirdC
+
+all: $(EXECS)
+
+first: first.c
+	gcc $(CFLAGS) first.c -o first
+
+second: second.c
+	gcc $(CFLAGS) second.c -o second
+
+third: third.c
+	gcc $(CFLAGS) third.c -o third
+
+thirdA: thirdA.c
+	gcc $(CFLAGS) thirdA.c -o thirdA
+
+thirdB: thirdB.c
+	gcc $(CFLAGS) thirdB.c -o thirdB
+
+thirdC: thirdC.c
+	gcc $(CFLAGS) thirdC.c -o thirdC
+
+fourth: fourth.c
+	gcc $(CFLAGS) fourth.c -o fourth
+
+fifth: fifth.c
+	gcc $(CFLAGS) fifth.c -o fifth
+
+sixth: sixth.c
+	gcc $(CFLAGS) sixth.c -o sixth
+
+seventh: seventh.c
+	gcc $(CFLAGS) seventh.c -o seventh
+
+eighth: eight.c
+	gcc $(CFLAGS) eighth.c -o eighth
+
+ninth: ninth.c
+	gcc $(CFLAGS) ninth.c -o ninth
+
+clean:
+	/bin/rm -rf $(EXECS)
+

Lec1/eighth.c

+#include <stdio.h>
+
+int main(int argc, char* argv[]) {
+
+	float pi = 3.1415926;
+	char *pf = (char*) &pi;
+	int i;
+
+	printf("pi= %f\n\n", pi);
+
+	for (i=0; i<4; i++) {
+		printf("pf[%d]= %x\n", i, pf[i]);
+	}
+}

Lec1/fifth.c

+#include <stdio.h>
+
+int main(int argc, char* argv[]) {
+
+  char error_message[] = "Something evil happened.";
+	printf("%s\n", error_message);
+
+  error_message[10] = 'g';
+  error_message[11] = 'o';
+  error_message[12] = 'o';
+  error_message[13] = 'd';
+  printf("%s\n", error_message);
+
+}

Lec1/first.c

+#include <stdio.h>
+
+int main(int argc, char* argv[]) {
+	printf("hello C world\n");
+}

Lec1/fourth.c

+#include <stdio.h>
+
+int main(int argc, char* argv[]) {
+
+	int i, j;
+
+	j=0;
+	for (i=0; i<100; i++) {
+		j += i;
+	}
+	printf("i= %d, j= %d\n\n", i, j);
+
+	i=0; j=0;
+	while (i<100) {
+		j += i;
+		i++;
+	}
+	printf("i= %d, j= %d\n\n", i, j);
+
+	i=0; j=0;
+	do {
+		j += i;
+		i++;
+	} while (i<100);
+	printf("i= %d, j= %d\n\n", i, j);
+}

Lec1/ninth.c

+#include <stdio.h>
+#include <stdlib.h>
+
+char *str1;
+char str2[20] = "hello dufus!";
+
+int main(int argc, char* argv[]) {
+
+	printf("str1= %pn", str1);
+	str1 = malloc(40);
+	printf("str1= %p\n", str1);
+	
+	printf("str2= %p\n", str2);
+	printf("&str2= %p\n", &str2);
+	printf("&(str2[0])= %p\n", &(str2[0]));
+	
+}

Lec1/second.c

+#include <stdio.h>
+int main(int argc, char* argv[]) {
+	int i = 7;
+	double x = 3.1415926;
+	char c = 'w';;
+
+	printf("%d, %c, %lf\n",i, c, x);
+}

Lec1/seventh.c

+#include <stdio.h>
+#include <string.h>
+
+int main(int argc, char* argv[]) {
+
+	int i;
+
+	char p[] = "This is a test.";
+
+	for (i=0; i<strlen(p); i++) {
+		printf("%c", p[i]);
+	}
+	printf("\n\n");
+
+	printf("string starting at p= %s\n", p); 
+	printf("content of p= %p\n\n", p);
+
+	char *s = p;
+	printf("string starting at s= %s\n", s);
+	printf("length= %d\n", (int) strlen(s));
+	printf("s[5]= %c\n", s[5]);
+	printf("*(s+6)= %c\n\n", *(s+6));
+}

Lec1/sixth.c

+#include <stdio.h>
+
+int main(int argc, char* argv[]) {
+
+	int   i = 7;
+	int   j = -1;
+
+	int*  pi = &i;
+	int*  pj = &j;
+
+	printf(" i = %d\n", i);
+	printf(" j = %d\n", j);
+	printf(" pi= %p\n", pi);
+	printf(" pj= %p\n", pj);
+	printf(" data pointed to by pi= %d\n", *pi);
+	printf(" data pointed to by pj= %d\n\n", *pj);
+
+	*pi = 6;
+	pj = pi - 1;
+
+	printf(" i = %d\n", i);
+	printf(" j = %d\n", j);
+	printf(" pi= %p\n", pi);
+	printf(" pj= %p\n", pj);
+	printf(" data pointed to by pi= %d\n", *pi);
+	printf(" data pointed to by pj= %d\n\n", *pj);
+
+}

Lec1/third.c

+#include <stdio.h>
+
+int main(int argc, char* argv[]) {
+	{
+		int i = 999;
+		int j = 666;
+		printf("i= %d, j= %d\n", i, j);
+		{
+			int i = 123;
+			int j = i*i;
+			printf("i= %d, j= %d\n", i, j);
+		}
+		printf("i= %d, j= %d\n", i, j);
+	}
+}

Lec1/thirdA.c

+#include <stdio.h>
+
+int i = 7;
+float x = 2.71828;
+double y = 3.1415926;
+char c = 'w';
+
+int main(int argc, char* argv[]) {
+	printf("%d, %c, %f, %lf\n", i, c, x, y);
+}

Lec1/thirdB.c

+#include <stdio.h>
+
+int main(int argc, char* argv[]) {
+	int i = 7;
+	float x = 2.71828;
+	double y = 3.1415926;
+	char c = 'w';
+
+	printf("%d, %c, %f, %lf\n", i, c, x, y);
+}

Lec1/thirdC.c

+#include <stdio.h>
+
+int main(int argc, char* argv[]) {
+	static int i = 7;
+	float x = 2.71828;
+	static double y = 3.1415926;
+	char c = 'w';
+	printf("%d, %c, %f, %lf\n", i, c, x, y);
+}