C语言 刚入门求帮解！

Question

Answer 1

有帮助望采纳
1.

#include<cstdio>
int a,b,c;
float d;
int main()
{
    scanf("%d%d%d",&a,&b,&c);
    d=a+b+c;
    printf("%.2f",d/3);
    return 0;
}

2.

#include<cstdio>
float a,b;
int main()
{
    scanf("%f",&a);
    b=a*30.48;
    printf("%f",b);
    return 0;
}