float i, largest = 0;
scanf("%f", &i);
while(i > 0){
printf("Enter a number : %.2f", i);
if (i > largest)
largest = i;
scanf("%f", &i);
}
printf("The largest was : %.2f", largest);
原文：https://www.cnblogs.com/cjbsai/p/14606837.html