在主函数中输入a,b,c三个变量的值,通过调用函数完成由大到小的排序,答:include<stdio.h> void sort(int *x,int *y){ int k;if(*x<*y){k=*x;x=*y;y=k;} } int main(){ void sort(int *x,int *y);int a,b,c;int *ap,*bp,*cp;ap=&a;bp=&b;cp=&c;scanf("%d %d %d",&a,&b,&c);sort(ap,bp);sort(ap,cp);sort(bp,cp);printf(...