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  1. #include "stdio.h"
  2. #include "stdlib.h"
  3. #include "math.h"
  4. struct c_comp                                          //define a struct
  5. {
  6.         double rmz;
  7.         double imz;
  8. }c_comp;
  9. void c_comp_product(struct c_comp*,struct c_comp*,struct c_comp*);   //declare a func of complex product
  10.  
  11.  
  12. int main()                                             //main func starts
  13. {
  14. int num;
  15. struct c_comp *a1,*a2,*c;                              //declare pointers
  16. a1=(struct c_comp*)malloc(sizeof(struct c_comp));      //let pointers direct to menory locations
  17. a2=(struct c_comp*)malloc(sizeof(struct c_comp));
  18. c=(struct c_comp*)malloc(sizeof(struct c_comp));
  19. a1->rmz=1.0;a1->imz=1.0;                               //decide the values of each pointer structs
  20. a2->rmz=2.0;a2->imz=2.0;
  21. c_comp_product(a1,a2,c);                               //call func of complex product
  22. return 0;
  23. }                                                      //main func ends
  24.  
  25.  
  26. void c_comp_product(struct c_comp *a1,struct c_comp *a2,struct c_comp *c)  //definition of the func of complex product
  27. {
  28.         double p,q,s;
  29.         if(a1 == NULL || a2 == NULL || c == NULL)
  30.         { printf("(c_comp_product)The c_comp pointer is NULL!\n"); }
  31.         p = a1->rmz*a2->rmz;
  32.         q = a1->imz*a2->imz;
  33.         s = (a1->rmz + a1->imz)*(a2->rmz + a2->imz);
  34.         c->rmz = p - q;
  35.         c->imz = s - p - q;
  36.         printf("hello\n");
  37.         printf("%f %f\n",c->rmz,c->imz);
  38.  
  39. }
  40.  
Success #stdin #stdout 0s 1964KB
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stdin
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Standard input is empty
stdout
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hello
0.000000 4.000000
https://ideone.com/4eS4Qb
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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