View Code of Problem 47

#include<stdio.h>
int main()
{
  int a,bc,sun,acc;
  float aver;
  printf("请输入三个整数");
  scanf("%d%d%d",&a,&b,&c);
  sum=a+b+c;
  aver=sum/3;
  acc=a*b*c;
  printf("%d %d %.2f",sum,acc,aver);
  return 0;
}
/*
Main.c: In function 'main':
Main.c:7:22: error: 'b' undeclared (first use in this function)
   scanf("%d%d%d",&a,&b,&c);
                      ^
Main.c:7:22: note: each undeclared identifier is reported only once for each function it appears in
Main.c:7:25: error: 'c' undeclared (first use in this function)
   scanf("%d%d%d",&a,&b,&c);
                         ^
Main.c:8:3: error: 'sum' undeclared (first use in this function)
   sum=a+b+c;
   ^
Main.c:4:12: warning: unused variable 'sun' [-Wunused-variable]
   int a,bc,sun,acc;
            ^
Main.c:4:9: warning: unused variable 'bc' [-Wunused-variable]
   int a,bc,sun,acc;
         ^
*/