C 中的结构，编译器错误 [英] Structs in C, compiler error

问题描述

我收到此错误:

str.c:5:19: error: expected identifier or '(' before 'struct'

编译以下代码时.有什么问题吗?

when compiling the following code. What is wrong with it?

#include <stdio.h>

struct addpoints (struct point p1, struct point p2){
    p1.x += p2.x;
    p1.y += p2.y;
    return p1;
}

int main(){
    struct point{
        int x;
        int y;
    };

    struct point p1 = { 13, 22 };
    struct point p2 = { 10, 10 };

    addpoints (p1,p2);

    printf("%d\n", p1.x);

}

推荐答案

struct addpoints (struct point p1, struct point p2){

struct 不是类型.struct point 是一种类型.

struct is not a type. struct point is a type.

在使用之前声明你的struct point类型，这里你在main函数中声明struct point.

Also declare your struct point type before using it, here you are declaring struct point in main function.

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