单项选择题
A.＜include ＜stdio.h＞int main（）{printf（"hello world\n"）；return 0；}
B.＜include ＜stdio.h＞int man（）{printf（"hello world\n"）；return 0；}
C.＜include ＜stdio.h＞int main（）{printf（"hello world\n"）return 0；}
D.＜include ＜stdio.h＞int main（）{print（"hello world\n"）；return 0；}