Great C programming funHEADmaster

Excellent fundamentals and displine training, many tools and techniques
exercises: gdb, emacs, valgrind, git

4 files changed, 162 insertions, 0 deletions

diff --git a/02_code1/README b/02_code1/README
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+Open the code1.c file you have in this directory.
+You will see two functions:  max and main.
+
+In max, the algorithm is written as comments, but there is no code.
+You should translate this algorithm to code.
+
+In main, there are three print statements which call max and print
+its result.  These would let you check if max is working right.
+
+There is also a comment asking you to write one more print statement
+with a call to max.  In that comment, it asks you to take the max
+of two numbers (written as hex), and print them out.
+Add a line of code to do this.
+
+When you have done this, run
+
+./test.sh
+
+This script will try to compile your code (which you will learn about in
+the next chapter), as well as run it.   If your code does not have legal
+syntax, it will do its best to describe what is wrong.  If there
+is a problem, look at the code and try to see where you did not follow
+the syntax rules from chapter 2.  The line number and message it gives
+may help you find the problem.  If you cannot find the problem after a minute
+or two, ask for help.
+
+If your code has legal syntax, test.sh will also run it, and show
+you the output it produced, as well as the output we expected.
+
+If they are the same, you should commit, push, and grade.
+
+If they are not, you should see if you can fix the problem (and ask for help
+if you cannot).
diff --git a/02_code1/code1.c b/02_code1/code1.c
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+++ b/02_code1/code1.c
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+int max (int num1, int num2) {
+  //check if num1 is greater than num2
+    //if so, your answer is num1
+    //otherwise, your answer is num2
+  if (num1 > num2) {
+    return num1;
+  }
+  return num2;
+}
+
+int main(void) {
+  printf("max(42, -69) is %d\n", max(42, -69));
+  printf("max(33, 0) is %d\n", max(33, 0));
+  printf("max(0x123456, 123456) is %d\n", max(0x123456, 123456));
+  //compute the max of 0x451215AF and 0x913591AF and print it out as a decimal number
+  printf("max(0x451215AF, 0x913591AF) is %d\n", max(0x451215AF, 0x913591AF));
+  
+  return 0;
+}
+
diff --git a/02_code1/grade.txt b/02_code1/grade.txt
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+++ b/02_code1/grade.txt
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+Grading at Sat 27 Nov 2021 02:14:17 AM UTC
+Checking code1.c for legal syntax
+Checking for int max (int num1, int num2)
+Found on line 3, column 1 
+Checking for int main(void)
+Found on line 13, column 1 
+Trying to run the code..
+Your file matched the expected output
+Removing your main() and replacing it with our own to run more tests...
+Testing max(-999, -2147483648) ... Correct
+Testing max(-999, 123) ... Correct
+Testing max(-999, 567) ... Correct
+Testing max(-999, 891) ... Correct
+Testing max(-999, 0) ... Correct
+Testing max(-999, 1) ... Correct
+Testing max(-999, -999) ... Correct
+Testing max(-999, 123123123) ... Correct
+Testing max(-87, -2147483648) ... Correct
+Testing max(-87, 123) ... Correct
+Testing max(-87, 567) ... Correct
+Testing max(-87, 891) ... Correct
+Testing max(-87, 0) ... Correct
+Testing max(-87, 1) ... Correct
+Testing max(-87, -999) ... Correct
+Testing max(-87, 123123123) ... Correct
+Testing max(0, -2147483648) ... Correct
+Testing max(0, 123) ... Correct
+Testing max(0, 567) ... Correct
+Testing max(0, 891) ... Correct
+Testing max(0, 0) ... Correct
+Testing max(0, 1) ... Correct
+Testing max(0, -999) ... Correct
+Testing max(0, 123123123) ... Correct
+Testing max(1, -2147483648) ... Correct
+Testing max(1, 123) ... Correct
+Testing max(1, 567) ... Correct
+Testing max(1, 891) ... Correct
+Testing max(1, 0) ... Correct
+Testing max(1, 1) ... Correct
+Testing max(1, -999) ... Correct
+Testing max(1, 123123123) ... Correct
+Testing max(240, -2147483648) ... Correct
+Testing max(240, 123) ... Correct
+Testing max(240, 567) ... Correct
+Testing max(240, 891) ... Correct
+Testing max(240, 0) ... Correct
+Testing max(240, 1) ... Correct
+Testing max(240, -999) ... Correct
+Testing max(240, 123123123) ... Correct
+Testing max(345, -2147483648) ... Correct
+Testing max(345, 123) ... Correct
+Testing max(345, 567) ... Correct
+Testing max(345, 891) ... Correct
+Testing max(345, 0) ... Correct
+Testing max(345, 1) ... Correct
+Testing max(345, -999) ... Correct
+Testing max(345, 123123123) ... Correct
+Testing max(999999, -2147483648) ... Correct
+Testing max(999999, 123) ... Correct
+Testing max(999999, 567) ... Correct
+Testing max(999999, 891) ... Correct
+Testing max(999999, 0) ... Correct
+Testing max(999999, 1) ... Correct
+Testing max(999999, -999) ... Correct
+Testing max(999999, 123123123) ... Correct
+Testing max(2147483647, -2147483648) ... Correct
+Testing max(2147483647, 123) ... Correct
+Testing max(2147483647, 567) ... Correct
+Testing max(2147483647, 891) ... Correct
+Testing max(2147483647, 0) ... Correct
+Testing max(2147483647, 1) ... Correct
+Testing max(2147483647, -999) ... Correct
+Testing max(2147483647, 123123123) ... Correct
+
+Overall Grade: A
diff --git a/02_code1/test.sh b/02_code1/test.sh
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+++ b/02_code1/test.sh
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+#!/bin/bash
+cat > temp.c <<EOF
+#include <stdio.h>
+#include <stdlib.h>
+EOF
+cat code1.c >> temp.c
+gcc -Wall -Werror -pedantic -std=gnu99 temp.c -o code1 2>errors.txt
+if [ "$?" = "0" ]
+    then
+    echo "Your code appears to have legal syntax!"
+    echo "Here is what I get when I run it..."
+    echo "-----------------"
+    ./code1
+    echo "-----------------"
+    echo "Here is what I would expect the answers to be:"
+    echo "----------------"
+    cat <<EOF 
+max(42,-69) is 42
+max(33,0) is 33
+max(0x123456,123456) is 1193046
+max(0x451215AF, 0x913591AF) is 1158813103
+EOF
+    echo "---------------"
+    else
+    echo "Oh no, the syntax of your code is not correct!"
+    mesg=`grep error errors.txt | head -1`
+    ln=`echo "$mesg" | cut -f2 -d":"`
+    let ln=${ln}-2
+    echo "I discovered the problem on line $ln "
+    echo "(though the problem may be earlier and I just got confused)"
+    echo "Here is my best attempt to describe what is wrong:"
+    echo "$mesg" | cut -f5 -d":"
+    fi
+rm -f temp.c errors.txt code1