1.# include & ltstdio.h & gt
void main()
{
int a,b;浮動c;
Printf("請輸入兩個數字");
scanf("%d %d ",& amp壹,& ampb);
c =((float)(a+b))/2;
Printf("這兩個數的平均值=%.2f ",c);
}
2.# include & ltstdio.h & gt
void main()
{
浮點a=6,b=7,c = 0;
c = a+b;
c = c/2;
Printf("這兩個數的平均值為=%f ",c);
}