int
main(void)
{
int n1, d1; /* numerator, denominator of first fraction */
int n2, d2; /* numerator, denominator of second fraction */
char op; /* arithmetic operator + - * or / */
char again; /* y or n depending on user's desire to continue */
int n_ans, /* numerator, denominator of answer */
d_ans;
/* While the user wants to continue, gets and solves arithmetic
problems with common fractions. */
do
{
/* Gets a fraction problem */
scan_fraction(&n1, &d1);
op = get_operator();
scan_fraction(&n2, &d2);
/* Computes the result */
switch (op)
{
case '+':
add_fractions(n1, d1, n2, d2, &n_ans, &d_ans);
break;
case '-':
add_fractions(n1, d1, -n2, d2, &n_ans, &d_ans);
break;
case '*':
multiply_fractions(n1, d1, n2, d2, &n_ans, &d_ans);
break;
case '/':
multiply_fractions(n1, d1, d2, n2, &n_ans, &d_ans);
}
reduce_fraction(&n_ans, &d_ans);
/* Displays problem and result */
printf("\n");
print_fraction(n1, d1);
printf(" %c ", op);
print_fraction(n2, d2);
printf(" = ");
print_fraction(n_ans, d_ans);
/* Asks user about doing another problem */
printf("\nDo another problem? (y/n) > ");
scanf(" %c", &again);
}
while (again == 'Y' || again == 'y');
return(0);
}
void test_multiply_fractions(void)
{
fraction_t fr1, fr2, product;
int numerator, denominator;
// Test multiply_fractions: 2/3 * 1/2
//fr1.num = 2;
//fr1.den = 3;
//fr2.num = 1;
//fr2.den = 2;
make_fraction(2, 3, &fr1);
make_fraction(1, 2, &fr2);
product.num = 0;
product.den = 0;
multiply_fractions(&fr1, &fr2, &product);
numerator = product.num;
denominator = product.den;
sput_fail_unless(numerator == 1,
"multiply_fractions: 2/3 * 1/2 ==> 1/3, "
"check numerator");
sput_fail_unless(denominator == 3,
"multiply_fractions: 2/3 * 1/2 ==> 1/3, "
"check denominator");
// Test multiply_fractions: 1/2 * 2/1
//fr1.num = 1;
//fr1.den = 2;
//fr2.num = 2;
//fr2.den = 1;
make_fraction(1, 2, &fr1);
make_fraction(2, 1, &fr2);
product.num = 0;
product.den = 0;
multiply_fractions(&fr1, &fr2, &product);
numerator = product.num;
denominator = product.den;
sput_fail_unless(numerator == 1,
"multiply_fractions: 1/2 * 2/1 ==> 1/1, "
"check numerator");
sput_fail_unless(denominator == 1,
"multiply_fractions: 1/2 * 2/1 ==> 1/1, "
"check denominator");
}
/*
* d) Multiply the fractions f1 and f2.
*/
void test_part_d(void){
struct fraction product, f1, f2;
printf("Enter first fraction (a/b): ");
scanf("%d / %d", &f1.numerator, &f1.denominator);
printf("Enter second fraction (a/b): ");
scanf("%d / %d", &f2.numerator, &f2.denominator);
product = multiply_fractions(f1, f2);
product = reduce_fraction(product);
printf("Product of the fractions: %d/%d\n", product.numerator, product.denominator);
}
void test_fraction(int numerator1, int denominator1,
int numerator2, int denominator2,
enum FRACTION_OPERATION operation,
int mixed)
{
struct FRACTION a = make_fraction(numerator1, denominator1);
struct FRACTION b = make_fraction(numerator2, denominator2);
struct FRACTION c;
char op;
if (operation == foAdd)
{
c = add_fractions(&a, &b);
op = '+';
}
else if (operation == foSubtract)
{
c = subtract_fractions(&a, &b);
op = '-';
}
else
{
c = multiply_fractions(&a, &b);
op = '*';
}
printf("%i/%i %c %i/%i = %i/%i", a.numerator, a.denominator,
op,
b.numerator, b.denominator,
c.numerator, c.denominator);
if (mixed)
{
struct MIXED_FRACTION mixed = reduced_to_mixed(&c);
printf(" ==> ");
/* There's a whole number portion */
if (mixed.whole_number)
printf("%i ", mixed.whole_number);
/* There's a proper fraction portion */
if (mixed.proper_fraction.numerator)
printf("%i/%i", mixed.proper_fraction.numerator,
mixed.proper_fraction.denominator);
if (!mixed.whole_number && !mixed.proper_fraction.numerator)
printf("0");
}
printf("\n");
}
int main(void)
{
struct fraction fr;
/* Test print_fraction. */
printf("\nTesting print_fraction.\n");
fr.num = 1;
fr.den = 3;
printf("Calling print_fraction to print 1/3. Actual result = ");
print_fraction(fr);
printf(".\n");
fr.num = -1;
fr.den = 3;
printf("Calling print_fraction to print -1/3. Actual result = ");
print_fraction(fr);
printf(".\n");
/* Test gcd. */
printf("\nTesting gcd.\n");
if (gcd(42,30) != 6)
printf("Calling gcd(42, 30). Expected result = 6. Actual result = %d.\n",
gcd(42, 30));
if (gcd(30,42) != 6)
printf("Calling gcd(30, 42). Expected result = 6. Actual result = %d.\n",
gcd(30, 42));
if (gcd(-42,30) != 6)
printf("Calling gcd(-42, 30). Expected result = 6. Actual result = %d.\n",
gcd(-42, 30));
if (gcd(42,-30) != 6)
printf("Calling gcd(42, -30). Expected result = 6. Actual result = %d.\n",
gcd(42, -30));
if (gcd(-42,-30) != 6)
printf("Calling gcd(-42, -30). Expected result = 6. Actual result = %d.\n",
gcd(-42, -30));
if (gcd(144,55) != 1)
printf("Calling gcd(144, 55). Expected result = 1. Actual result = %d.\n",
gcd(144, 55));
/* Test reduce. */
printf("\nTesting reduce.\n");
fr.num = 1;
fr.den = 3;
printf("Reduce 1/3. Expected result = 1/3. Actual result = ");
print_fraction(reduce(fr));
printf(".\n");
fr.num = 6;
fr.den = 8;
printf("Reduce 6/8. Expected result = 3/4. Actual result = ");
print_fraction(reduce(fr));
printf(".\n");
fr.num = -2;
fr.den = 3;
printf("Reduce -2/3. Expected result = -2/3. Actual result = ");
print_fraction(reduce(fr));
printf(".\n");
fr.num = 4;
fr.den = -5;
printf("Reduce 4/-5. Expected result = -4/5. Actual result = ");
print_fraction(reduce(fr));
printf(".\n");
fr.num = -6;
fr.den = -8;
printf("Reduce -6/-8. Expected result = 3/4. Actual result = ");
print_fraction(reduce(fr));
printf(".\n");
fr.num = 0;
fr.den = 7;
printf("Reduce 0/7. Expected result = 0/1. Actual result = ");
print_fraction(reduce(fr));
printf(".\n");
/* Test make_fraction. */
printf("\nTesting make_fraction.\n");
struct fraction result;
result = make_fraction(1,3);
if (result.num != 1 || result.den != 3) {
printf("Calling make_fraction(1, 3). Expected result = 1/3. Actual result = ");
print_fraction(make_fraction(1, 3));
printf(".\n");
}
result = make_fraction(6,8);
if (result.num != 3 || result.den != 4) {
printf("Calling make_fraction(6, 8). Expected result = 3/4. Actual result = ");
print_fraction(make_fraction(6, 8));
printf(".\n");
}
result = make_fraction(-2,3);
if (result.num != -2 || result.den != 3) {
printf("Calling make_fraction(-2, 3). Expected result = -2/3. Actual result = ");
print_fraction(make_fraction(-2, 3));
printf(".\n");
}
result = make_fraction(4,-5);
if (result.num != -4 || result.den != 5) {
printf("Calling make_fraction(4, -5). Expected result = -4/5. Actual result = ");
print_fraction(make_fraction(4, -5));
printf(".\n");
}
result = make_fraction(-6,-8);
if (result.num != 3 || result.den != 4) {
printf("Calling make_fraction(-6, -8). Expected result = 3/4. Actual result = ");
print_fraction(make_fraction(-6, -8));
printf(".\n");
}
result = make_fraction(0,7);
if (result.num != 0 || result.den != 1) {
printf("Calling make_fraction(0, 7). Expected result = 0/1. Actual result = ");
print_fraction(make_fraction(0, 7));
printf(".\n");
}
/* Test multiply_fractions. */
printf("\nTesting multiply_fractions.\n");
result = multiply_fractions(make_fraction(0,1), make_fraction(0,2));
if (result.num != 0 || result.den != 1) {
printf("Calling multiply_fractions(make_fraction(0,1), make_fraction(0,2)). Expected result = 0/1. Actual result = ");
print_fraction(result);
printf(".\n");
}
result = multiply_fractions(make_fraction(1,1), make_fraction(0,2));
if (result.num != 0 || result.den != 1) {
printf("Calling multiply_fractions(make_fraction(1,1), make_fraction(0,2)). Expected result = 0/1. Actual result = ");
print_fraction(result);
printf(".\n");
}
result = multiply_fractions(make_fraction(0,1), make_fraction(2,2));
if (result.num != 0 || result.den != 1) {
printf("Calling multiply_fractions(make_fraction(0,1), make_fraction(2,2)). Expected result = 0/1. Actual result = ");
print_fraction(result);
printf(".\n");
}
result = multiply_fractions(make_fraction(3,1), make_fraction(4,2));
if (result.num != 6 || result.den != 1) {
printf("Calling multiply_fractions(make_fraction(3,1), make_fraction(4,2)). Expected result = 6/1. Actual result = ");
print_fraction(result);
printf(".\n");
}
result = multiply_fractions(make_fraction(3,2), make_fraction(2,9));
if (result.num != 1 || result.den != 3) {
printf("Calling multiply_fractions(make_fraction(3,2), make_fraction(2,9)). Expected result = 1/3. Actual result = ");
print_fraction(result);
printf(".\n");
}
result = multiply_fractions(make_fraction(3,12), make_fraction(4,9));
if (result.num != 1 || result.den != 9) {
printf("Calling multiply_fractions(make_fraction(3,12), make_fraction(4,9)). Expected result = 1/1. Actual result = ");
print_fraction(result);
printf(".\n");
}
/* Test add_fractions. */
printf("\nTesting add_fractions.\n");
result = add_fractions(make_fraction(0,1), make_fraction(0,2));
if (result.num != 0 || result.den != 1) {
printf("Calling add_fractions(make_fraction(0,1), make_fraction(0,2)). Expected result = 0/1. Actual result = ");
print_fraction(result);
printf(".\n");
}
result = add_fractions(make_fraction(1,1), make_fraction(0,2));
if (result.num != 1 || result.den != 1) {
printf("Calling add_fractions(make_fraction(1,1), make_fraction(0,2)). Expected result = 1/1. Actual result = ");
print_fraction(result);
printf(".\n");
}
result = add_fractions(make_fraction(0,1), make_fraction(2,2));
if (result.num != 1 || result.den != 1) {
printf("Calling add_fractions(make_fraction(0,1), make_fraction(2,2)). Expected result = 1/1. Actual result = ");
print_fraction(result);
printf(".\n");
}
result = add_fractions(make_fraction(3,1), make_fraction(4,2));
if (result.num != 5 || result.den != 1) {
printf("Calling add_fractions(make_fraction(3,1), make_fraction(4,2)). Expected result = 5/1. Actual result = ");
print_fraction(result);
printf(".\n");
}
result = add_fractions(make_fraction(3,2), make_fraction(2,9));
if (result.num != 31 || result.den != 18) {
printf("Calling add_fractions(make_fraction(3,2), make_fraction(2,9)). Expected result = 31/18. Actual result = ");
print_fraction(result);
printf(".\n");
}
result = add_fractions(make_fraction(3,12), make_fraction(4,9));
if (result.num != 25 || result.den != 36) {
printf("Calling add_fractions(make_fraction(3,12), make_fraction(4,9)). Expected result = 25/36. Actual result = ");
print_fraction(result);
printf(".\n");
}
return 0;
}