99 lines
2.0 KiB
Plaintext
99 lines
2.0 KiB
Plaintext
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// float global constants
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const float RADIUS = 5.5, PI = 03.141592653589793, EPS = 1e-6;
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// hexadecimal float constant
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const float PI_HEX = 0x1.921fb6p+1, HEX2 = 0x.AP-3;
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// float constant evaluation
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const float FACT = -.33E+5, EVAL1 = PI * RADIUS * RADIUS, EVAL2 = 2 * PI_HEX * RADIUS, EVAL3 = PI * 2 * RADIUS;
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// float constant implicit conversion
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const float CONV1 = 233, CONV2 = 0xfff;
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const int MAX = 1e9, TWO = 2.9, THREE = 3.2, FIVE = TWO + THREE;
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// float -> float function
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float float_abs(float x) {
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if (x < 0) return -x;
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return x;
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}
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// int -> float function & float/int expression
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float circle_area(int radius) {
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return (PI * radius * radius + (radius * radius) * PI) / 2;
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}
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// float -> float -> int function & float/int expression
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int float_eq(float a, float b) {
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if (float_abs(a - b) < EPS) {
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return 1 * 2. / 2;
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} else {
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return 0;
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}
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}
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void error() {
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putch(101);
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putch(114);
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putch(114);
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putch(111);
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putch(114);
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putch(10);
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}
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void ok() {
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putch(111);
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putch(107);
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putch(10);
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}
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void assert(int cond) {
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if (!cond) {
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error();
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} else {
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ok();
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}
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}
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void assert_not(int cond) {
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if (cond) {
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error();
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} else {
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ok();
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}
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}
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int main() {
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assert_not(float_eq(HEX2, FACT));
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assert_not(float_eq(EVAL1, EVAL2));
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assert(float_eq(EVAL2, EVAL3));
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assert(float_eq(circle_area(RADIUS) /* f->i implicit conversion */,
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circle_area(FIVE)));
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assert_not(float_eq(CONV1, CONV2) /* i->f implicit conversion */);
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// float conditional expressions
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if (1.5) ok();
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if (!!3.3) ok();
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if (.0 && 3) error();
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if (0 || 0.3) ok();
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// float array & I/O functions
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int i = 1, p = 0;
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float arr[10] = {1., 2};
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int len = getfarray(arr);
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while (i < MAX) {
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float input = getfloat();
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float area = PI * input * input, area_trunc = circle_area(input);
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arr[p] = arr[p] + input;
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putfloat(area);
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putch(32);
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putint(area_trunc); // f->i implicit conversion
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putch(10);
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i = i * - -1e1;
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p = p + 1;
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}
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putfarray(len, arr);
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return 0;
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}
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