例5-6

#include<stdio.h> float result_real,result_imag;

int main(void) {  float imag1,imag2,real1,real2;

 void complex_prod(float real1,float imag1,float real2,float imag2);  void complex_add(float real1,float imag1,float real2,float imag2);

 printf("Enter 1st complex number(real and imaginary):");  scanf("%f%f",&real1,&imag1);

 printf("Enter 2nd complex number(real and imaginary):");  scanf("%f%f",&real2,&imag2);

 complex_add(real1,imag1,real2,imag2);    printf("addition of complex is %f+%fi ",result_real,result_imag);

 complex_prod(real1,imag1,real2,imag2);  printf("product of complex is %f+%fi ",result_real,result_imag);

 return 0; } void complex_add(float real1,float imag1,float real2,float imag2) {   result_real=real1+real2;   result_imag=imag1+imag2; } void complex_prod(float real1,float imag1,float real2,float imag2) {  result_real=real1*real2-imag1*imag2;  result_imag=real1*imag2+real2*imag1; }