第三次实验第三项

#include <stdio.h>

#include <math.h>

int main(){

         int a,b,c,d,e;

         int sum;

         sum=0;

         for(a=1;a<=5;a++){

                   d=a*100;

                   for(b=1;b<=5;b++){

                            e=b*10;

                            for(c=1;c<=5;c++){

                                     if(a!=b&&b!=c&&a!=c){

                                               printf("%d\n",d+e+c);

                                     sum=sum+1;

                                     }

                            }

                   }

         }

         printf("一共有%d个数\n",sum);

return 0;

}