Checkbox
Checkbox
Status
Done
Summary : learn how to use command line to code, compile and debug.
- Compile
programinto executable file:gcc -o program program.cExecute:./program
- Install local C Compiler:
sudo apt install build-essential cgdb valgrind
gcc -g -o program program.cwill causegccto store information in the executable program for debugging.
- use
gdb programto usegdbto debug; - print the information of the program:
list list m, n: print the code from line m to line n;- Set a breakpoint:
break ...(line number) info breakpoints: show the information of all breakpoints;delete: delete all the breakpoints;delete ...: delete breakpoint of line …;run: usegdbto run program;stepandnextwill cause the program to execute a single line. The difference is that when coming up with functions,stepwill enter it whilenextwill not.- If the program needs interactive input, then enter inputs while using
gdbto run the program, or redirection:(gdb) run < input.txtor./program < input.txt continue: jump to the next breakpoint;p variableorprint variable: print the information of the variable;- Display the value of a variable after every step:
display variable; - show a list of all variables an their values in the current function:
info locals;