Question

Complete the functions for the program complex.c (Down) . The program adds, subtracts,and multiplies complex numbers. The C program will prompt the user for the choice of operations,read in the complex numbers, perform the operations, and print the results. The main programrepeatedly prints the menu, reads in the user’s selection, and performs the operation. We use pointers only for those arguments that the function intends to change. In all thefunctions, r represents the real component and i represents the imaginary component. Studythe program and complete the following functions. Do not modify the function prototypes. 1) Complete the function that reads in two complex numbers. void read_nums(double *r1, double *i1, double *r2, double *i2); The function should prompt for the user to enter the real component and imaginarycomponent of the first number and the second number and store the values in the variablespointed by r1, i1, r2, i2, respectively. 2) Complete the following functions that calculate the addition, subtraction, and multiplicationof two complex numbers. The functions take real component and imaginary component ofthe first number and the second number and store the values in the variables pointed by r3 and i3, respectively. #include void read_numbers(double *r1, double *i1, double *r2, double *i2); void add(double r1, double i1, double r2, double i2, double *r3, double *i3); void subtract(double r1, double i1, double r2, double i2, double *r3, double *i3); void multiply(double r1, double i1, double r2, double i2, double *r3, double *i3); void print_complex(double r3, double i3); int main(void) { double r1, r2, r3, i1, i2, i3; int option; printf("Complex Number Arithmetic Program: \n\n"); for(;;) { printf("1. Add two complex numbers\n"); printf("2. Subtract two complex numbers\n"); printf("3. Multiply two complex numbers\n"); printf("4. Quit\n\n"); printf("Choose an option (1 - 4): "); scanf("%d", &option); switch(option){ case 1: read_numbers(&r1, &i1, &r2, &i2); add(r1, i1, r2, i2, &r3, &i3); print_complex(r3, i3); break; case 2: read_numbers(&r1, &i1, &r2, &i2); subtract(r1, i1, r2, i2, &r3, &i3); print_complex(r3, i3); break; case 3: read_numbers(&r1, &i1, &r2, &i2); multiply(r1, i1, r2, i2, &r3, &i3); print_complex(r3, i3); break; case 4: return 0; default: printf("Invalid option. Choose an option (1-4):\n"); } } return 0; } void read_numbers(double *r1, double *i1, double *r2, double *i2) { //add your code here } void add(double r1, double i1, double r2, double i2, double *r3, double *i3) { //add your code here } void subtract(double r1, double i1, double r2, double i2, double *r3, double *i3) { //add your code here } void multiply(double r1, double i1, double r2, double i2, double *r3, double *i3) { //add your code here } void print_complex(double r3, double i3) { if(i3 >= 0) printf("The operation yields %.3f + %.3fi\n\n", r3, i3); else printf("The operation yields %.3f %.3fi\n\n", r3, i3); }