#include<stdio.h> int max3(int a,int b,int c) { int max = a; if(max<b) { max = b; } if(max<c) { max = c; } return max; } int main() { int a= 0; int b = 0; int c= 0; double sum = 0.0; scanf("%d%d%d",&a,&b,&c);...