ho14_2.c

Software Development in C: A Practical Approach to Programming and Design 软件开发：编程与设计（C））——国外经典教材·计

#include <stdio.h>

struct complex_number
{
	double i,j;
};


struct complex_number GetComplexNumber(void);
void PrintComplexNumber(
		struct complex_number numberToPrint);
struct complex_number AddComplexNumbers(
						struct complex_number firstNumber,
						struct complex_number secondNumber);


int main()
{
	struct complex_number aComplexNumber;
	struct complex_number anotherComplexNumber;
	struct complex_number result;

	printf("\nPlease enter a complex number. Type the\n");
	printf("imaginary part of the number, then press Enter.");
	printf("\nNext, type the real part of the ");
	printf("number.\n");
	aComplexNumber = GetComplexNumber();

	printf("\nPlease enter another complex number. \n");
	anotherComplexNumber = GetComplexNumber();

	result = AddComplexNumbers(aComplexNumber,
							   anotherComplexNumber);

	printf("\n");
	printf("  ");
	PrintComplexNumber(aComplexNumber);
	printf("\n");
	printf("+ ");
	PrintComplexNumber(anotherComplexNumber);
	printf("\n");
	printf("--------------------------\n");
	printf("  ");
	PrintComplexNumber(result);
	printf("\n");

	return (0);
}


struct complex_number GetComplexNumber(void)
{
	struct complex_number theNumber;

	printf("Imaginary part: ");
	scanf("%lf",&theNumber.i);
	printf("Real part: ");
	scanf("%lf",&theNumber.j);

	return (theNumber);
}

void PrintComplexNumber(
		struct complex_number numberToPrint)
{
	printf("(%lfi + %lfj)",
		   numberToPrint.i,
		   numberToPrint.j);
}


struct complex_number AddComplexNumbers(
						struct complex_number firstNumber,
						struct complex_number secondNumber)
{
	struct complex_number result;

	result.i = firstNumber.i + secondNumber.i;
	result.j = firstNumber.j + secondNumber.j;

	return (result);
}