2 3. standard io
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![Use of printf() and scanf()
printf() Print Format 曙企, 覃伎 伎 豢ロ
覈(矧)企.
printf(format string.., argument list);
[Ex]
#include <stdio.h>
int main() {
int n ;
n = 25 * 10;
printf(%d, n);
}
[Ex]
printf(%c%c%c, a, b, c );
printf(%s, def );
/* 250 豢ル. */
/* abc 螳 豢ル. */
/* def 螳 豢ル. */
2](https://image.slidesharecdn.com/2-3-140310043238-phpapp01/85/2-3-standard-io-2-320.jpg)
![Use of printf() and scanf()
The Use of printf() : integer %d
printf( %md, a );
printf( %-md, a);
/*m .るジ讓曙 */
/*m . 殊曙 */
[Ex]
a = 12;
printf(%5d%-5d%dn ,a, a, a+11);
12^^^^^^1223
%5d襦 豢 : 12^^^
( 5襴 殊曙襦 豢, れ 螻糾 朱 螻給葦朱 豈)
%-5d襦 豢 : ^^^12
( 5襴 るジ讓曙襦 豢, 螻糾 朱 螻給葦朱 豈)
%d襦 豢 : 23
(a +11 螳 23 蠏碁襦 豢)
4](https://image.slidesharecdn.com/2-3-140310043238-phpapp01/85/2-3-standard-io-4-320.jpg)
![Use of printf() and scanf()
The Use of printf() : float %f
printf( %m.pf, a );
printf( %-m.pf, a);
/*m, p .るジ讓曙 */
/*m, p . 殊曙 */
[Ex]
83.1260^^83.126083.126000^^^83.13
a = 83.126;
printf(%8.4f%-8.4f%f%-7.2fn, a, a, a, a );
%8.4f : 83.1260^
( 豐 8襴 襯 豢ロ 危 4襴蟾
讌 . )
%-8.4f : ^83.1260
(%8.4f , 蠏碁 襦 誤 るジ讓曙朱 )
%f
: 83.126000
(豺語 危 6襦 豢)
%-7.2f : ^^^83.13
(7襴 覲伎 危 2襴-覦襴, るジ讓 )
5](https://image.slidesharecdn.com/2-3-140310043238-phpapp01/85/2-3-standard-io-5-320.jpg)
![Use of printf() and scanf()
[Ex]
#include <stdio.h>
int main() {
int n ;
printf(Enter number : );
scanf(%d, &n);
printf(You entered : %d, n);
return 0;
}
Enter number : 10
You entered : 10
7](https://image.slidesharecdn.com/2-3-140310043238-phpapp01/85/2-3-standard-io-7-320.jpg)
2 3. standard io
- 1. Standard I/O
- 2. Use of printf() and scanf() printf() Print Format 曙企, 覃伎 伎 豢ロ 覈(矧)企. printf(format string.., argument list); [Ex] #include <stdio.h> int main() { int n ; n = 25 * 10; printf(%d, n); } [Ex] printf(%c%c%c, a, b, c ); printf(%s, def ); /* 250 豢ル. */ /* abc 螳 豢ル. */ /* def 螳 豢ル. */ 2
- 3. Use of printf() and scanf() Conversion characters (format string) %c character (覓語) printf(%c, a); %d decimal integer (10讌襦豢) printf(%d, 100); %x Hexadecimal integer (16讌襦豢) printf(%x, 100); %o Octal integer (8讌襦豢) printf(%o, 100); %u Unsigned decimal (襦豢) printf(%u, 100); %e floating point number in scientific notation printf(%e, 1.234); %f floating point number printf(%f, 1.234); %g e-format f-format printf(%g, 1.234); %s string (覓語) printf(%s, C-book); 3
- 4. Use of printf() and scanf() The Use of printf() : integer %d printf( %md, a ); printf( %-md, a); /*m .るジ讓曙 */ /*m . 殊曙 */ [Ex] a = 12; printf(%5d%-5d%dn ,a, a, a+11); 12^^^^^^1223 %5d襦 豢 : 12^^^ ( 5襴 殊曙襦 豢, れ 螻糾 朱 螻給葦朱 豈) %-5d襦 豢 : ^^^12 ( 5襴 るジ讓曙襦 豢, 螻糾 朱 螻給葦朱 豈) %d襦 豢 : 23 (a +11 螳 23 蠏碁襦 豢) 4
- 5. Use of printf() and scanf() The Use of printf() : float %f printf( %m.pf, a ); printf( %-m.pf, a); /*m, p .るジ讓曙 */ /*m, p . 殊曙 */ [Ex] 83.1260^^83.126083.126000^^^83.13 a = 83.126; printf(%8.4f%-8.4f%f%-7.2fn, a, a, a, a ); %8.4f : 83.1260^ ( 豐 8襴 襯 豢ロ 危 4襴蟾 讌 . ) %-8.4f : ^83.1260 (%8.4f , 蠏碁 襦 誤 るジ讓曙朱 ) %f : 83.126000 (豺語 危 6襦 豢) %-7.2f : ^^^83.13 (7襴 覲伎 危 2襴-覦襴, るジ讓 ) 5
- 6. Use of printf() and scanf() Use of scanf() scanf() - key board襦覿 data襯 覦蠍 矧 . scanf(format string.., argument list); %c character (覓語) scanf(%c, &a); %d decimal integer (10讌) scanf(%d, &a); %f floating point number (float) scanf(%f, &a); %lf floating point number (double) scanf(%lf, &a); %Lf floating point number (long double) scanf(%Lf, &a); %s string (覓語) scanf(%s, &a); 6
- 7. Use of printf() and scanf() [Ex] #include <stdio.h> int main() { int n ; printf(Enter number : ); scanf(%d, &n); printf(You entered : %d, n); return 0; } Enter number : 10 You entered : 10 7