c++ - SDL C++ 类函数错误

Question

我在 main.cpp 中的代码片段

playerEntity::handle()
{
    if( event.type == SDL_KEYDOWN )
    {
            switch( event.key.keysym.sym )
            {
                    case SDLK_q:
                            running = false;
                            paused = true;
                            break;
                    case SDLK_ESCAPE:
                            paused = !paused;
                            break;
            }
    }

    if( keystate[SDLK_UP] )
    {
            if( isJumping == false && isFreeFalling == false )
            {
                    isJumping = true;
            }
    }
    if( keystate[SDLK_LEFT] )  player.hitbox.x--;
    if( keystate[SDLK_RIGHT] ) player.hitbox.x++;
    if( player.hitbox.x < 0 ) {player.hitbox.x = 0;}
    else if( player.hitbox.x > screen.WIDTH - player.hitbox.w ) {player.hitbox.x = screen.WIDTH - player.hitbox.w;}
    if( player.hitbox.y < 0 ) {player.hitbox.y = 0;}
    else if( player.hitbox.y > screen.HEIGHT - player.hitbox.h ) {player.hitbox.y = screen.HEIGHT - player.hitbox.h;}
}

其中 playerEntity 在头文件中定义:

#ifndef PLAYERENTITY_H
#define PLAYERENTITY_H

class playerEntity
{
    private:
            int jumpHeight;
            int jump;
            bool isJumping;
            bool isFalling;
            bool isFreeFalling;
            SDL_Event event;
            Uint8 *keystate;
    public:
            playerEntity();
            void jump();
            void handle();
            void fall();
            int health;
            int damage;
            SDL_Rect hitbox;
            bool evolved;
};

#endif

当我尝试编译时出现错误:ISO c++ 禁止声明没有类型的“句柄”[-fpermissive]“int playerEntity::handle()”的原型(prototype)与“playerEntity”类中的任何原型(prototype)都不匹配错误:候选者是:void playerEntity::handle()。我对头文件和类还不熟悉，如何修复错误？

Answer 1

你应该替换

playerEntity::handle()

与

void playerEntity::handle()