c - 结构不编译？

Question

我正在尝试学习结构并在 .h 和 .c 文件中分别包含以下代码。

    typedef struct{
    int lengthOfSong;
    int yearRecorded;
} Song;

Song makeSong (int length, int year);
void displaySong(Song theSong);

.c:

Song makeSong(int length, int year){
    Song newSong;
    newSong.lengthOfSong = length;
    newSong.yearRecorded = year;

    displaySong(newSong);

    return newSong;
}

void displaySong(Song theSong){
    printf("This is the length of the song: %i \n This is the year recorded: %i", theSong.lengthOfSong, theSong.yearRecorded);
}

出于某种原因，我收到错误:song.c:1: error: expected '=', ',', ';', 'asm' or 'attribute' before '做歌'song.c:11: 错误:在‘theSong’之前需要‘)’

我做错了什么吗？

编辑主函数(其他函数已经运行):

   #include <stdio.h>
#include "math_functions.h"
#include "song.h"

main(){
    int differ = difference(10, 5);
    int thesum = sum(3, 7);
    printf("differnece: %i, sum: %i \n", differ, thesum);
    Song theSong = makeSong(5, 8);

}

Answer 1

displaySong 接受一个参数 theSong 而你正在尝试使用 newSong

您还需要 #include "song.h" 来自 song.c - 错误消息看起来您跳过了它。