Program for function f(t) in C

I have a function f(t) =

e^(−5) e^(−5cos cos(t)) e^(10cos(t)) e^(−5sin sin(t))

I need to find the value of f for different values of t. Let us say from t=0 to t=5. How to write coding for that?. I just know some basics of C.

For, While and Do While Loops in C - Cprogramming.com

I would likely use a for loop.

Tim S.

Code:

---

double f ( double t ) {
  double answer = pow(2.7182818,-5);
  return answer;
}
int main ( ) {
  for ( double t = 0 ; t < 5 ; t++ ) {
    printf("f(%f)=%f\n", t, f(t));
  }
}

---

I should get like this
f(0)= 1
f(1)=1
f(2)=1
f(3)=1
f(4)=1
f(5)=1
I have done the programming for f(0). Can you tell me how to insert loop here?

Code:

---


#include <stdio.h>
#include <math.h>
#define PI 3.14159265
int t;
double cos(double x);
int main(int argc, const char * argv[])
{
    double x, ret1, val, val1;
    int roundret1;
    t = 0;
                          /* first exponential*/
    /*define variables*/
    double value;
    double result;
  /* Assign the value we will find the exp of */
    value = -5;
/* Calculate the exponential of the value */
    result = exp(value);
 /* Display the result of the calculation */
    printf("The Exponential of %f is %f\n", value, result);
   
                        /*second exponential*/
    /*defining variables*/
    double value1;
    double ret;
    double result1;
    int tempCheck, tempret1;
   
    val = PI / 180.0;
    ret = cos( t*val );
    printf("The ret is %f\n", ret);
    ret1 = cos(ret*val );
    printf("The ret1 is %f\n", ret1);
    /*rounding the ret1*/
    if(ret1>0)
    {
        tempret1 = ret1*10;
        tempCheck = tempret1%10;
        if(tempCheck>=5)
        {
            roundret1 = ret1;
            roundret1++;
        }
        else
        {
            roundret1 = ret1;
        }
        printf("The roundret1 is %d\n", roundret1);
    }
   
    /* Assign the value we will find the exp of */
    value1 = -5*roundret1;
    printf("The value1 is %f\n", value1);
   


    /* Calculate the exponential of the value */
    result1 = exp(value1);
    /* Display the result of the calculation */
    printf("The Exponential of %f is %f\n", value1, result1);
   
                /* Third exponential*/
    /*defining variables*/
    double value2, result2;
   
    value2 = 10;
    result2 = exp(value2);
 /* Display the result of the calculation */
    printf("The Exponential of %f is %f\n", value2, result2);
   
              /* fourth exponential*/
    /*defining variables*/
    double ret2, ret3, value3, result3;
   
  ret2 = sin(t*val);
  ret3 = sin(ret2);
  value3 = -5*ret3;
    printf("The value1 is %f\n", value2);
    /* Calculate the exponential of the value */
    result3 = exp(value3);
    /* Display the result of the calculation */
    printf("The Exponential of %f is %f\n", value3, result3);
           
    /*multiplying 4 exponentials*/
    double F;
    F=result*result1*result2*result3;
    printf("The final value of F when t=0 is %f\n", F);
    return 0;
}

---

Are you sure the equation is correct?

Attachment 16382

> Can you tell me how to insert loop here?
I already showed you.

You put the bulk of that main() into another function and call it f(), with a parameter of t.

Then the loop goes in main, as I SHOWED YOU!.

And... let's say the first equation is correct... So, you want to calculate a FUNCTION, isn't it? Why not to code a function f()?

Code:

---

double f(double t)
{
  return exp(-5)*exp(-5*cos(cos(t)))*exp(10*cos(t))*exp(-5*sin(sin(t)));
}

---

Yes the equation is absolutely correct