(1) داله لحساب الوقت time :-
time()
Prototype: time_t time(time_t* timer);
Header File: time.h
ANSI: C and C++
Explanation: Returns and sets the passed in variable to the number of seconds that have passed since 00:00:00 GMT January 1, 1970. If NULL is passed in, it will work as if it accepted nothing and return the same value.
Example:
//Program will use time_t to store number of seconds since 00:00:00 GMT Jan.
//1, 1970
#include
#include
int main()
{
time_t hold_time;
hold_time=time(NULL);
cout<<"The number of elapsed seconds since Jan. 1, 1970 is "<
return 0;
}
(2) داله لحساب القيمه المطلقه abs :-
abs()
Prototype: int abs(int aNum);
Header File: math.h and stdlib.h
Explanation: The abs function returns the absolute value of a number (makes it positive).
Example:
//Program asks for user input of an integer
//It will convert it to positive if it was negative
#include
#include
int main()
{
int aNum;
cout<<"Enter a positive or negative integer";
cin>>aNum;
cout<
return 0;
}
(3) داله لحساب جيب الزاويه ( ) sin :-
asin()
Prototype: double asin(double a_sin);
Header File: math.h
Explanation: Asin is used to find the arcsine of a number (give it a sin value and it will return the angle, in radians corresponding to that value). It must be passed an argument between -1 and 1.
//Example gives the angle corresponding to sine 1
#include
#include
int main()
{
cout<
return 0;
}
(4) داله لحساب جيب تمام الزاويه ( ) cos :-
acos()
Prototype: double acos(double a_cos);
Header File: math.h
Explanation: Acos is used to find the arccosine of a number (give it a cosine value and it will return the angle, in radians corresponding to that value). It must be passed an argument between -1 and 1.
//Example gives the angle corresponding to cosine .5
#include
#include
int main()
{
cout<
return 0;
}
(5) داله لحساب ظل الزاويه ( ) tan :-
atan()
Prototype: double atan(double a_tan);
Header File: math.h
Explanation: Acos is used to find the arctangent of a number (give it a tangent value and it will return the angle, in radians corresponding to that value). It accepts all real numbers.
//Example gives the angle corresponding to tangent 10
#include
#include
int main()
{
cout<
return 0;
}
(6) داله لحساب اللوغريثم بالنسبه للعدد ( )log :-
log()
Prototype: double log(double anumber);
Header File: math.h
Explanation: Log returns the natural logarithm for anumber, as long as it is not negative, or zero. .
//Example gives the natural logarithm of 100
#include
#include
int main()
{
cout<
return 0;
}
(7) داله لحساب الجذر التربيعي بالنسبه للعدد ( )sqrt :-
sqrt()
Prototype: double sqrt(double Value);
Header File: math.h
Explanation: Returns the square root of Value. Probably not a good idea to try a negative number for Value...
Example:
//Example will give sqare root of numbers 1 to 10
#include
#include
int main()
{
for(int x=1; x<11; x++)
cout<<"Square root of: "<
return 0;
}
(8) داله تخبرك بالساعه الان ( ) colck :-
clock()
Prototype: clock_t clock(void);
Header File: time.h
Explanation: This function returns the number of clock ticks (the CPU time taken) the program has taken. To convert to the number of seconds, divide by CLOCKS_PER_SEC, which is defined in time.h
Example:
//Example will run a loop, and then print the number of clock ticks and
//number of seconds used
#include
#include
int main()
{
for(int x=0; x<1000; x++)
cout<
cout<<"Clock ticks: "<
return 0;
}
(9) داله للقسمه ( ) div :-
div()
Prototype: div_t div(int numerator, int denominator);
Header File: stdlib.h
Explanation: Div takes a fraction (numerator/denominator) and places the quotient andthe remainder into the struct it returns, div_t. In div_t the two ints are quot and rem, quotient and remainder.
Example:
//Example shows division
#include
#include
int main()
{
div_t answer;
answer = div(76, 5)
cout<<"As an improper fraction, 76/5";
cout<<"As a proper fraction, "<
return 0;
}
(10) داله تعطي العدد مرفوع للقوة ( ) power :-
pow()
Prototype: double pow(double b, double p);
Header File: math.h
Explanation: This function raises b to the p power.
Example:
//Example will computer 4 to the 5th
#include
#include
int main()
{
cout<<"4 to the 5th power is: "<
return 0;
}
واخر دعوانا ان الحمد لله رب العالمين وصلي اللهم وبارك علي سيدنا محمد
وعلي اله عدد كمال الله وكما يليق بكماله ...........................................
مع تحياتي فتح الرحمن البحر....................................................