#include #include #include #define ABS(x) ( x>0 ? x: (x*-1) ) using namespace std; /* Code count revert mul real Numbers. */ float revertMul(float *numbers, int length) { int counter = 0; float result = 1; while (counter < length && numbers[counter] > 0) { result *= (1 / numbers[counter]); counter++; } return result; } /* 1/1 * 1/2 * 1/3 = 1/6 0.166667 */ void testRevertMulOne() { int length = 5; float *numbers{ new float[length] { 1, 2, 3, -2, 4 }}; float expect = 0.166667f; float result = revertMul(numbers, length); //math.h if (fabs(expect - result) < 0.000001f) { cout << "testRevertMulOne Correct !!! " << expect << " == " << result << "\n"; } else { cout << "testRevertMulOne Not correct !!! " << expect << " != " << result << "\n"; } } /* 1/1 * 1/2 * 1/3 * 1/4 = 1/24 0. */ void testRevertMulTwo() { int length = 7; float *numbers{ new float[length] { 1, 2, 3, 4, -2, -3, 4 }}; float expect = 0.0416667f; float result = revertMul(numbers, length); //praprocessor if (ABS(expect - result) < 0.000001f) { cout << "testRevertMulTwo Correct !!! " << expect << " == " << result << "\n"; } else { cout << "testRevertMulTwo Not correct !!! " << expect << " != " << result << "\n"; } } int main(int argc, char** argv) { testRevertMulOne(); testRevertMulTwo(); return 0; }