#include <stdio.h>
/* 考慮一下哪個輸出該用無參函數(shù)哪個輸出該用有參函數(shù)呢？
int learning()
{
??? printf("%s\n","小明已經(jīng)在慕課網(wǎng)上學(xué)習");
??? return 0;
???
}
int number(int n)
{
??? printf("小明在慕課網(wǎng)上已經(jīng)參與學(xué)習了%d門課程"，n);
??? return 0;
}

int main()
{??? learning();
???? number(5);

??? return 0;
}