2. C
C
C

3. C
1
standard functions)
1
mathematic functions)
1
2–5
-8

4. Character functions)
8
String functions)
8 - 10

5. C
C
C
Header file C h
standard functions)
C
header file C h
header file
#include<header file.h>

6. C compiler
” ” library functions)
mathematic functions)
#include <math.
h>
type) double
double
acos(x) asin(x) atan(x)
sin(x) cos(x) tan(x)
sqrt(x) exp(x) pow(x,y)

7. log(x) log10(x) ceil(x)
floor(x) fabs(x)
acos(x)
arc cosine
x x
radian)
acos(x);
2) asin(x)
arc sine
x x
asin(x);

8. 3) atan(x)
arc tan
x x
atan(x);
sin(x)
sine x
x
sin(x);
5) cos(x)
cosine x
x

9. cos(x);
6) tan(x)
tan x x
tan(x);
acos(x), asin(x),
atan(x), sin(x),
cos(x) tan(x)
acos(x), asin(x), atan(x), sin(x),
cos(x) tan(x)

10. * math1.c */
#include<stdio.h>
/*
#include<math.h>
/*
#include<conio.h>
/*
void main(void)
/*
{
double r, pi = 3.141592654;
/*
r = pi/180;
/*

11. clrscr();
/*
printf("%fn",asin(r));
/*
printf("%fn",acos(r));
/*
printf("%fn",atan(r));
/*
printf("%fn",sin(r));
/*
printf("%fn",cos(r));
/*
printf("%fn",tan(r));
/*
printf("nPress any key back to program ..."); /*

12. getch();
/*
}

13. printf("%fn",asin(r));
arc sin r r
printf("%fn",acos(r));
arc cosine r r

14. printf("%fn",atan(r));
arc tan r r
printf("%fn",sin(r));
sine r r
printf("%fn",cos(r));
cosine r r
printf("%fn",tan(r));
tan r r

15. enter
sqrt(x)
square root)
x x
sqrt(x);
8) exp(x)
ex x
e e
exp(x);

16. 9) pow(x,y)
xy
x
y
pow(x, y);
character functions)
single char
( byte)
#include<ctype.h>
isalnum(ch),

17. isalpha(ch), isdigit(ch), islower(ch), isupper(ch),
tolower(ch), toupper(ch),
isspace(ch), isxdigit(ch)
1.3 string functions)
string)
#include<string.h>
strlen(s), strcmp(s1,s2)
, strcpy(s), strcat(s1,s2)
1.4
clrscr( )
text
mode
gotoxy(x,y)
cursor)

18. sizeof(x)
x
Byte
user defined functions)
C
” ”
” ”
user define functions : UDF)
C