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Header filemath.h
Declarationfloat copysignf(float val, float signval);
double copysign(double val, double signval);
long double copysignl(long double val, long double signval);
Functiongives val the same sign as signval, and return the result.


#include <math.h>
  #include <stdio.h>

  int main(void)
  {

    printf("%f", copysignf(1.0, -2.0));
   
  }

-1.000000








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