编辑代码

#include <stdio.h>
main () {
    int n,i;
    printf("\n please input a number :\n");
    scanf("%d",&n);
    printf("%d=",n);
    for (i=2;i<=n;i++){
        while(n!=i){
            if(n%i==0){
                printf("%d*",i);
                n=n/i;
            }
            else
            break;
        }
    }
    printf("%d",n);
}