print float overly simple
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#include <stdio.h>
#include <stdint.h>
void print_float_value(uint64_t v, size_t i, bool prev_p) {
if(i >= 4 && v <= 0) {
return;
} else {
bool p = prev_p | (v % 10 != 0);
print_float_value(v / 10, i + 1, p);
if(i >= 3 || p) {
if(i == 2) {
putchar('.');
}
putchar('0' + v % 10);
}
}
}
// Note: This does not work for doubles larger then "uint64_t max / 1000"
void print_float(double v) {
if(v < 0) {
putchar('-');
v = -v;
}
print_float_value(v * 1000 + 0.5, 0, false);
}
int main() {
print_float(-9.1235); putchar('\n');
print_float(0); putchar('\n');
print_float(5561134); putchar('\n');
print_float(20.05); putchar('\n');
print_float(700.0); putchar('\n');
return 0;
}
Cpp
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