From 442a49ad5a48d417345959b903ae6a6d32d55759 Mon Sep 17 00:00:00 2001 From: Haidong Ji Date: Fri, 15 Apr 2022 15:51:30 -0500 Subject: Great C programming fun Excellent fundamentals and displine training, many tools and techniques exercises: gdb, emacs, valgrind, git --- 03_code2/README | 34 ++++++++++++++++++++++++++++++++++ 03_code2/code2.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++ 03_code2/grade.txt | 23 +++++++++++++++++++++++ 03_code2/test.sh | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 154 insertions(+) create mode 100644 03_code2/README create mode 100644 03_code2/code2.c create mode 100644 03_code2/grade.txt create mode 100755 03_code2/test.sh (limited to '03_code2') diff --git a/03_code2/README b/03_code2/README new file mode 100644 index 0000000..704aefc --- /dev/null +++ b/03_code2/README @@ -0,0 +1,34 @@ +Open the code2.c file you have in this directory. +You will see two functions: printTriangle and main. + +As with the previous problem, the printTriangle function +has an algorithm written as comments, but there is no code. +You should translate this algorithm to code. + +In main, there are three print statements which print out a triangle +with height 4, and the total number of stars in that triangle (returned +by the printTriangle function). + +There is also a comment asking you to write a few more statements +to do the same thing for a triangle of height 7. +Add the code to do this. + +When you have done this, run + +./test.sh + +As before, this script will try to compile your code (which you will learn about +ina n upcoming lesson), 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 Course 1 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/03_code2/code2.c b/03_code2/code2.c new file mode 100644 index 0000000..25af8a0 --- /dev/null +++ b/03_code2/code2.c @@ -0,0 +1,51 @@ + +int printTriangle(int size) { + //start with starCount being 0 + int starCount = 0; + + //count from 0 (inclusive) to size (exclusive), for each number i that you count + for (int i = 0; i < size; i++) { + + //count from 0 (inclusive) to i (inclusive), for each number j that you count + for (int j = 0; j <= i; j++) { + + //print a "*" + printf("*"); + + //increment starCount + starCount++; + } + + //when you finish counting on j, + + //print a newline ("\n") + printf("\n"); + } + + //when you finish counting on i, + + //your answer is starCount + return starCount; + +} + + +int main(void) { + int numStars; + printf("Here is a triangle with height 4\n"); + numStars = printTriangle(4); + printf("That triangle had %d total stars\n", numStars); + //now print "Here is a triangle with height 7\n" + printf("Here is a triangle with height 7\n"); + + //then call printTriangle, passing in 7, and assign the result to numStars + numStars = printTriangle(7); + + //finally, print "That triangle had %d total stars\n", such that the %d + //prints the value of numStars + printf("That triangle had %d total stars\n", numStars); + + + return 0; +} + diff --git a/03_code2/grade.txt b/03_code2/grade.txt new file mode 100644 index 0000000..0138468 --- /dev/null +++ b/03_code2/grade.txt @@ -0,0 +1,23 @@ +Grading at Sat 27 Nov 2021 02:21:26 AM UTC +Checking code2.c for legal syntax +Checking for int printTriangle (int size) +Found on line 4, column 1 +Checking for int main(void) +Found on line 35, 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 printTriangle(0) ... Correct +Testing printTriangle(1) ... Correct +Testing printTriangle(2) ... Correct +Testing printTriangle(3) ... Correct +Testing printTriangle(4) ... Correct +Testing printTriangle(7) ... Correct +Testing printTriangle(9) ... Correct +Testing printTriangle(12) ... Correct +Testing printTriangle(142) ... Correct +Testing printTriangle(191) ... Correct +Testing printTriangle(2037) ... Correct +Testing printTriangle(2479) ... Correct + +Overall Grade: A diff --git a/03_code2/test.sh b/03_code2/test.sh new file mode 100755 index 0000000..649b8a6 --- /dev/null +++ b/03_code2/test.sh @@ -0,0 +1,46 @@ +#!/bin/bash +cat > temp.c < +#include +EOF +cat code2.c >> temp.c +gcc -Wall -Werror -pedantic -std=gnu99 temp.c -o code2 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 "-----------------" + ./code2 + echo "-----------------" + echo "Here is what I would expect the answers to be:" + echo "----------------" + cat <