################
file description


lab0.c: this is the source file for this prokect
		we can use it by make
		./lab0 
			will copy from stdin to stdout
		./lab0 --input=1.txt
			will copy from file 1.txt to stdout
		./lab0 --output=2.txt
			will copy from stdin to file 2.txt
		./lab0 --input=1.txt output=2.txt
			will copy from 1,txt to 2.txt
		./lab0 --segfault 
			will introduce a segmenttion fault
		./lab0 --segfault --catch
			will catch the segmantation error


makefile :
		make 
			compile the .c file and crate executable under the default condition
		make clean
			delete the executable
		make check
			check is this file is likely to be compiled suscessufully
		make dist
			create the tarball



screen1.jpg:
		showing the backtrace info under gdb



screen2.jpg:
		showing that the null pointer is actually null


README:
		is the file u are currently reading







REFEENCE:


8:53 PM
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0ahUKEwit4bzMivTLAhUBn4MKHbOHAvsQFggjMAE&url=http%3A%2F%2Fstackoverflow.com%2Fquestions%2F14659147%2Fhow-to-print-pointer-content-in-gdb&usg=AFQjCNFpKMfZd4QC4Ve9ruHgknDSpROffw&sig2=5sKt4DYoS_JfX06s5IHbCw&cad=rjt
www.google.com


8:52 PM
Debugging with GDB - Examining Data
ftp.gnu.org


8:52 PM
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwit4bzMivTLAhUBn4MKHbOHAvsQFggdMAA&url=http%3A%2F%2Fftp.gnu.org%2Fold-gnu%2FManuals%2Fgdb%2Fhtml_chapter%2Fgdb_9.html&usg=AFQjCNE6t5ltn4OXvKOMXYNDanssXJY2mg&sig2=G4bonDOAznz3YnY1vIK5sg&cad=rjt
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8:52 PM
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8:48 PM
Fetching a remote - User Documentation
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8:48 PM
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8:48 PM
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8:47 PM
taoxiang1995/cs111
github.com


8:47 PM
Issues · taoxiang1995/cs111
github.com


8:44 PM
Create a New Repository
github.com


8:44 PM
taoxiang1995
github.com


8:44 PM

taoxiang1995
github.com


8:43 PM
Changing a remote's URL - User Documentation
help.github.com


8:43 PM
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0ahUKEwjCm9u8iPTLAhWKtoMKHS_8Cp4QFggfMAE&url=https%3A%2F%2Fhelp.github.com%2Farticles%2Fchanging-a-remote-s-url%2F&usg=AFQjCNGZte4B4GnhT4ZEJk-VKY1kf9Z0VQ&sig2=tccaifP6YXhqhtq9at9ezA&cad=rjt
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8:40 PM
(13) Shaun Liu - 消息
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8:39 PM
c++ - "please check gdb is codesigned - see taskgated(8)" - How to get gdb installed with homebrew code signed? - Stack Overflow
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8:39 PM
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8:39 PM
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gdb Tutorial
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8:38 PM
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8:38 PM
gdb QuickStart
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8:38 PM
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8:37 PM
How to Debug Using GDB
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8:37 PM
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8:36 PM
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8:36 PM
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8:36 PM
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8:36 PM
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8:36 PM
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&ved=0ahUKEwi099HuhvTLAhXCnIMKHaEuBBAQFgglMAI&url=http%3A%2F%2Fftp.gnu.org%2Fold-gnu%2FManuals%2Fgdb%2Fhtml_node%2Fgdb_42.html&usg=AFQjCNH-pcdXzYHYUBwUTJ9IbJxatz_0WA&sig2=bGy3FSgeFggu6yaIBNFxfg&cad=rjt
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8:36 PM
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8:35 PM
debugging - How can one grab a stack trace in C? - Stack Overflow
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8:35 PM
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8:35 PM
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8:33 PM
Debugging Options - Using the GNU Compiler Collection (GCC)
gcc.gnu.org


8:33 PM
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0ahUKEwi2yLyghvTLAhUKk4MKHehNAVYQFggjMAE&url=https%3A%2F%2Fgcc.gnu.org%2Fonlinedocs%2Fgcc-3.4.5%2Fgcc%2FDebugging-Options.html&usg=AFQjCNFyFzKwr7b0PX251iWbucM9upyEnw&sig2=kFBYJootzi2yDvzW8hxyRA&bvm=bv.118443451,d.amc
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8:33 PM
Debugging Options - Using the GNU Compiler Collection (GCC)
gcc.gnu.org


8:33 PM
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwi2yLyghvTLAhUKk4MKHehNAVYQFggcMAA&url=https%3A%2F%2Fgcc.gnu.org%2Fonlinedocs%2Fgcc%2FDebugging-Options.html&usg=AFQjCNF-8TvEkL_p85Cu_5P4Nz9VexUnfA&sig2=VRxWCHtT5L5wRj8QnfhIrQ&bvm=bv.118443451,d.amc
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8:33 PM
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8:33 PM
gcc -g option flag (debug)
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8:33 PM
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=9&sqi=2&ved=0ahUKEwj_-oCIhvTLAhVEl4MKHdw7CNAQFghWMAg&url=http%3A%2F%2Fwww.rapidtables.com%2Fcode%2Flinux%2Fgcc%2Fgcc-g.htm&usg=AFQjCNEUXmZWo6VDHVroSq5YoXWvrC4byg&sig2=Aa_ymZxtN0aQcoYpToC65Q&bvm=bv.118443451,d.amc
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8:32 PM
Compilation - Debugging with GDB
sourceware.org


8:32 PM
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&sqi=2&ved=0ahUKEwj_-oCIhvTLAhVEl4MKHdw7CNAQFggsMAI&url=https%3A%2F%2Fsourceware.org%2Fgdb%2Fonlinedocs%2Fgdb%2FCompilation.html&usg=AFQjCNHA3ZWiDv6kZQI9oxGUiugl9e9STA&sig2=LvuHeW4uad8QHyAMz98zfA&bvm=bv.118443451,d.amc
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8:32 PM
Debugging with GDB
www.delorie.com


8:32 PM
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&sqi=2&ved=0ahUKEwj_-oCIhvTLAhVEl4MKHdw7CNAQFggcMAA&url=http%3A%2F%2Fwww.delorie.com%2Fgnu%2Fdocs%2Fgdb%2Fgdb_17.html&usg=AFQjCNFLL97kMA3WlTJbUCHJRV2DHKv5IQ&sig2=ll1vxNnF5sUkstnes00QKg&bvm=bv.118443451,d.amc
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8:32 PM
how to compile with gdb option - Google Search
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8:32 PM
how to make a tarball unix example - Google Search
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8:31 PM
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8:26 PM
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8:26 PM
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwje4J_jhPTLAhVClYMKHaAPCjMQFggdMAA&url=http%3A%2F%2Fntraft.com%2Finstalling-gdb-on-os-x-mavericks%2F&usg=AFQjCNHKIg97sCYMcEi1lnYMka17P4wMgg&sig2=ew9O-1udHBtJ-I5SrKDmsg&cad=rjt
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8:26 PM
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8:12 PM
18 Tar Command Examples in Linux
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8:12 PM
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8:11 PM
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8:11 PM
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8:11 PM
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwiZ7Ji1gfTLAhWrmoMKHcQBDqAQFggdMAA&url=http%3A%2F%2Finfohost.nmt.edu%2Ftcc%2Fhelp%2Funix%2Ftar_build.html&usg=AFQjCNGThASKoSIfVpMhWSvbwDU-gfCA1w&sig2=Fa5mCQPDyerQ9MzHUxp3GA&cad=rjt
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8:10 PM
automake: Basics of Distribution
www.gnu.org


8:10 PM
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwjjjriYgfTLAhVCn4MKHUCBD3kQFggfMAA&url=https%3A%2F%2Fwww.gnu.org%2Fsoftware%2Fautomake%2Fmanual%2Fhtml_node%2FBasics-of-Distribution.html&usg=AFQjCNEhgUQ8zpvAkPkpgQVe3MsUNhp3BQ&sig2=Poda5QDEDVKtlfP4zthfSw&cad=rjt
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8:10 PM
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8:10 PM
GNU make: Complex Makefile
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8:10 PM
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0ahUKEwjDjoeHgfTLAhXBn4MKHUVDBPkQFggkMAE&url=https%3A%2F%2Fwww.gnu.org%2Fs%2Fmake%2Fmanual%2Fhtml_node%2FComplex-Makefile.html&usg=AFQjCNHOMIwCDrL3DnF7GHc3JjAMenVLxA&sig2=BUJqvTend3OuNKTt6iXK1w&cad=rjt
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8:10 PM
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8:09 PM
CS111 - Project 0: Warm-Up
web.cs.ucla.edu


8:09 PM

UCLA CS111 Schedule: Lectures, Reading, Quizes, Exams, Projects
web.cs.ucla.edu