int main(){
int a,b,c,d;
浮點和=0,ave
printf(" input 4 int data:\ n ");
scanf("%d %d %d %d ",& amp壹,& ampb & amp;c,& ampd);
sum = a+b+c+d;
ave =((int)(sum/4.0 * 10))/10.0;
printf("sum=%lf mean=%lf\n ",sum,ave);
返回0;
}