include<stdio.h> void main() { int a=0,n; printf("\n input n: "); scanf("%d",&amp;n); while (n--) printf("%d ",a++*2); } 我在C-Free上运行出现错误 问题补充：错误提示是“[Error] d:\My Documents\C-Free\Temp\未命名14.cpp:3: parse error before character 0241”