c=a+b
a+b,5*6,a/8
a+=5,a=a+5
a-=5 a=a-5
a*=5 a=a*5
a/=5 a=a/5
A%=5 a=a%5
=
a=8
a+=a-=a*=a-5
2-1
>
>=
<
<=
==
=
a=3,b=4,c=5
a<b1
a>b0
a>=c0
(a>b)!=c1
a<b==c0
a=3,b=4,c=5
(a<b)+c
2-2
if ((a>10) && (a<20))
&&
||
!
&&
1 2 1 && 2
||
,
1 2 1 || 2
3
!
!
> > > && > || >
2*3+4/2>3 AND 3<5 OR 10<9
[2*3+4/2]>3 AND 3<5 OR 10<9
[[2*3]+[4/2]]>3 AND 3<5 OR 10<9
[6+2]>3 AND 3<5 OR 10<9
[8>3] AND 3<5 OR 10<9 True AND True OR False
[True AND True] OR False
True OR False
True
i 10*3%6*6+5-2&&(2*2+6/3>1||2>8)
i 12%3/2+3*6>10&&!||!
2-1
x & y
x | y
~x
x^y
2-2
10 & 15 1010 & 1111 1010 10
10 | 15 1010 | 1111 1111 15
10 ^ 15 1010 ^ 1111 0101 5
~ 10 ~1010 0101 -11
char ch;
int i;
float f;
double d;
result=(ch/i)+(f*d)-(f+i);
int double float
double
double
#include <stdio.h>
void main()
{
double a=3.784;
printf("%d\n",(int)a);
}
printf()
scanf()
putchar()
getchar()
printf ()
printf (“,);
Printf()
#include <stdio.h>
void main()
{
printf("\n \n \n
%s\n","!!!");
}
printf ()
%
#include <stdio.h>
void main()
{
printf(" ");
}
%d
—
%f%e
—
%c
—
%s
—
#include <stdio.h>
void main()
{
int number_1=65;
char number_2='b';
printf("number_1=%d\n",number_1);
printf("number_1=%c\n",number_1);
printf("number_2=%c\n",number_2);
printf("number_2=%d\n",number_2);
}
,-”
printf()
#include <stdio.h>
void main()
{
printf("The number 555 in various forms:\n");
printf("Without any modifier,\n");
printf("[%d]\n",555);
printf("With – modifier,\n");
printf("[%-d]\n”,555);
printf("With digit string 10 as modifier,\n");
printf("[%10d]\n”,555);
printf("With 0 as modifier,\n");
printf("[%0d]\n”,555);
printf("With 0 and digit string 10 as modifiers,\n");
printf("[%010d]\n”,555);
printf("With -,0 and digit string 10 as modifiers,
\n");
printf("[%-010d]\n",555);
}
Printf()
#include <stdio.h>
void main()
{
int i=5;
float j=3.5;
printf("%c,%d,%f,%lf\n",
'a',i,j,i*j);
}
printf()
%d,%f,%e,%c,%s
d,f,s,c
#include <stdio.h>
void main()
{
int f=5;
float d=3.5;
printf("%c,f=%d,d=%f
,%lf\n",'a',f,d,f*d);
}
\n——
\t——
,,
,,
scanf()
scanf("control string ",argument list);
printf()
scanf()
scanf()
scanf("control string ",argument list);
printf()
scanf()
scanf()
scanf()
putchar()
putchar ( );
putchar()
putchar()
#include <stdio.h>
void main()
{
char ch_1='9';
putchar('B');
putchar('o');
putchar('y');
putchar('\t');
putchar(ch_1);
putchar('\n');
}
getchar()
getchar ( );
()
getchar()
#include <stdio.h>
void main()
{
char ch;
ch=getchar();
putchar(ch);
putchar('\n');
}
,(1)
(2)
ABCD
