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How to use conjf() in C
Ayesha Naeem
The conjf() function in C calculates the conjugate of a complex number. For example: for the complex number , the conjf() function will return .
To use the conjf() function, the program needs to include the complex.h header file as shown below:
#include <complex.h>
Parameters and return value
The conjf() function accepts a single parameter of type float complex.
conjf() returns a single value of type float complex.
Examples
The following code demonstrates the use of conjf() to calculate the conjugate of a complex number:
#include <stdio.h>
#include <complex.h>
int main()
{
// define complex number
float complex num = 4.3 + 9.1*I;
//get real part
float real = crealf(num);
//get imaginary part
float imag = cimagf(num);
printf("num is %.1f% + .1fi\n",real, imag );
//calculate conjugate.
float complex conj_num= conjf(num);
float conj_real = crealf(conj_num);
float conj_imag = cimagf(conj_num);
printf("Applying conjugation\n");
printf("num is %.1f% + .1fi\n",conj_real, conj_imag );
}Explanation
- The program defines a complex number of type
float, then obtains the real part throughcrealf()and the imaginary part throughcimagf(). - The
conjf()function calculates the conjugate of the complex number. - An output statement in line 12 shows the original number, and an output statement in line 17 shows the conjugate of the complex number.
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Ayesha Naeem
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