46 lines
767 B
C
46 lines
767 B
C
#include <stdio.h>
|
|
|
|
typedef int fixed;
|
|
#define FIXD (sizeof(fixed)*4)
|
|
|
|
fixed mpy(fixed a, fixed b) {
|
|
return (fixed) (((long)a * (long)b) >> FIXD);
|
|
}
|
|
|
|
fixed div(fixed a, fixed b) {
|
|
return (fixed) (((long)a << FIXD) / b);
|
|
}
|
|
|
|
fixed add(fixed a, fixed b) {
|
|
return a + b;
|
|
}
|
|
|
|
fixed sub(fixed a, fixed b) {
|
|
return a - b;
|
|
}
|
|
|
|
fixed fromdouble(double a) {
|
|
return (fixed) (a * (long)(1 << FIXD));
|
|
}
|
|
|
|
double todouble(fixed a) {
|
|
return (double)a / (long)(1 << FIXD);
|
|
}
|
|
|
|
int main( int argc, char *argv[] ) {
|
|
|
|
double af = 1.0f;
|
|
fixed a = fromdouble(af);
|
|
double bf = 2.0f;
|
|
fixed b = fromdouble(bf);
|
|
|
|
fixed c = div(a,b);
|
|
c = div(c,b);
|
|
double cf = todouble(c);
|
|
|
|
printf("%f\n",cf);
|
|
|
|
printf("%f\n",todouble(1));
|
|
|
|
return 0;
|
|
}
|