有以下程序 include<stdio.h> doublef(doublex); main() {doublea:0;inti; for(i=0;i<3
有以下程序 include<stdio.h> doublef(doublex); main() {doublea:0;inti; for(i=0;i<30;i+=10)a+=f((double)i); printf(%5.of\n,a); } doublef(doublex) {returnx*x+1;} 程序运行后的输出结果是
A.401
B.500
C.503
D.1404