第三周作业

#include<stdio.h>
int main()
 {
     int A,B;
        scanf("%d %d",&A,&B);
     int C=A*B;
        printf("%d",C);
     return 0;
 }

#include<stdio.h>
int main()
{
    int A,B,C,D;
       scanf("%d %d %d %d",&A,&B,&C,&D);
    int Sum=A+B+C+D;
    float Average=Sum/4.0;
       printf("Sum = %d; Average = %0.1f",Sum,Average);
    return 0;
}

#include<stdio.h> 
int main(){
    int A;
    scanf("%d",&A);
    float B=(A-100)*0.9*2;
    printf("%0.1f",B);
    return 0;
}

#include<stdio.h>
int main(){
  int a,b,c,d;
  scanf("%d",&a);
  b=a/100;
  c=a/10%10;
  d=a%10;
  printf("%d,%d,%d",b,c,d);
  return 0;
}