...用if...else双分支语句和if...elsi if..else语句设计“3个数排序...答:include<stdio.h> void main() /*3个数按由大到小排序*/ { int a,b,c;scanf("%d,%d,%d",&a,&b,&c);if(a>b)if(a>c)if(b>c)printf("%d,%d,%d",a,b,c);else printf("%d,%d,%d",a,c,b);else printf("%d,%d,%d",c,a,b);else if(b>c)if(a>c)printf("%d,...