Like this
#include <stdio.h>
#include <limits.h>
int main() {
double max = INT_MIN, min = INT.MAX;
double n;
while (scanf("%lf", &n) && n > 0) {
if (max < n) {
max = n;
}
if (min > n) {
min = n;
}
}
printf("最小值:%.2lf\n最大值:%.2lf\n", min, max);
return 0;
}