컴퓨터 프로그래밍 2 Week 1 : 프로그래밍 개발과정

2-C

2 Week 1: :

1 2

test.ctest.obj

test.exe(compiler)

(linker)(loader)(editer) (IDE)

(edit) (source file): () test.c

(compile) -> (object file) : () test.obj

(link) (executable file): () test.exe3

4Q & A(Q) , ?5(A) ! , . . . Visual C++ . .

(workspace); , .(project): 6: : 7/* */#include

int main(void){printf("Hello World!");return 0;}

Hello World! IDE : , #include

int main(){printf(" ");printf(" !\n");return 0;} : Code:Blocks [File] [New] . [Empty File] .

. . [Build] .

[Build] Code::Blocks hello.c .

[Build]

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(project):

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/* , , */#include Int main(){printf( %c .", 'C');printf(" %d .", 2);printf(" %.1f . ", 99.9);printf(" !");return 0;} C . 2 . 99.9 . !

Lab . printf() .

0.000000km/s. 9.800000m/s. 20 175.500000. . 4 . . . .Hint .

#include

int main(){printf(" %fkm/s. ", 300000);printf(" %fm/s. ", 9.8);

printf(" %d %f. ", 20, 175.5);printf(" %s. ", "");printf(" %d . ", 4);

return 0;} C . C C main() . C main() . C . 0 0 . . .

Supplement40 /* */#include

int main(void){printf("Hello World!");return 0;}41

Hello World! (comment): 42/* */

int main(void) /* */

/* */

. #include (header file): stdio.h: standard input output header file!: . 43#include

44(function): () = main() int main(void)

. . 45

Hello World! printf()printf() . .

46printf(Hello World!); return .47return 0;main()printf(Hello World!);return 0; #1 .48

Hello World!Kim ChulSoo 49/* */#include

int main(void){printf("Hello World!");printf(Kim ChulSoo");return 0;}Hello World!Kim ChulSoo ! \n \n .50

.51/* */#include

int main(void){printf("Hello World!\n");printf(Kim ChulSoo");return 0;}Hello World!Kim ChulSoo

#2 .52

3X1=33X2=63X3=9 .53/* */#include

int main(void){printf("3 X 1 = 3\n");printf("3 X 2 = 6\n");printf("3 X 3 = 9\n");

return 0;} . (error): (warning):

: : 0 :

54

55

56

ERROR!!

test.ctest.obj

test.exe(compiler)(linker)(execution) #157/* */#include

int main(void){printf("Hello World!\n")return 0;}--------------------Configuration: test - Win32 Debug--------------------Compiling...test.cC:\PROJECT\test\test.c(7) : error C2143: syntax error : missing ';' before 'return'Error executing cl.exe.

test.exe - 1 error(s), 0 warning(s)

; !! #258/* * /#include

int main(void){printf("Hello World!\n")return 0;}--------------------Configuration: test - Win32 Debug--------------------Compiling...test.cc:\project\test\test.c(9) : fatal error C1071: unexpected end of file found in commentError executing cl.exe.

test.exe - 1 error(s), 0 warning(s)* / -> #359/* */#include

int main(void){print("Hello World!");return 0;}--------------------Configuration: test - Win32 Debug--------------------Compiling...test.cc:\project\test\test.c(2) : fatal error C1083: Cannot open include file: 'stdio,h': No such file or directorystdio.h #460/* */#include

int main(void){print("Hello World!");return 0;}-------------------Configuration: test - Win32 Debug-------------------- Compiling... test.c C:\CPROGRAM\test\test.c(6) : warning C4013: 'print' undefined; assuming extern returning int Linking... test.obj : error LNK2001: unresolved external symbol _print Debug/test.exe : fatal error LNK1120: 1 unresolved externals Error executing link.exe.

test.exe - 2 error(s), 1 warning(s) print printf .61

Hello World! Good Morning 62/* */#include

int main(void){printf("Hello World!\n");// printf("Good Morning\n");return 0;}Hello World!Good Morning \n . 63/* */#include

int main(void){printf("Hello World! ");// printf("Good Morning\n");return 0;}Hello World! Good Morning !!

: 64

F5 (Go): F10 (Step Over): ( )F11 (Step Into): ( )F9 (Breakpoint):

65Q & A66