借助OOC-GCC,用面向對象的編程風格進行C語言的開發(仍是純C,輔助代碼借助有限的宏來簡化),頭文件請參見 /p/ooc-gcc,本例子通過實現壹個Animal類及其派生的Cat和Dog類,展現了用C語言模擬繼承與多態的能力.
另付了壹段CPP對比代碼,在不計算註釋保持合理換行的情況下,這個程序的實現OOC-GCC只比C++多了20多行,但是細節上,卻更加靈活,比如類的構造和析構是可控的.同時底層代碼可見,宏本身所做的工作是可見的.
另外OOC-GCC無需任何初始化的代碼,只需引入"OOStd.h"頭文件而已.
標簽： OOC GCC c MinGw OOC-GCC
代碼片段(2)
[代碼] 需要OOC-GCC的配合(請移步google code)
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#include "OOStd.h"
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CLASS(Animal){
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char *name;
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STATIC(Animal)
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vFn talk;
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};
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int Animal_reload(Animal *THIS,char *name){
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THIS->name=ALLOC(strlen(name)+1);
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memcpy(THIS->name,name,strlen(name));
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return 0;
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}
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int Animal_unload(Animal *THIS,void *PARAM){
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FREE(THIS->name);
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return 0;
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}
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ASM(Animal,Animal_reload,Animal_unload,NULL,NULL)
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CLASS_EX(Animal,Cat){
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STATIC_EX(Animal,Cat)
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};
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static void Meow(Animal *THIS){
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printf("Meow!My name is %s!\n",THIS->name);
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}
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int Cat_reloadSt(StAnimal *THIS,void *PARAM){
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THIS->talk=(void *)Meow;
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return 0;
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}
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ASM_EX(Animal,Cat,NULL,NULL,Cat_reloadSt,NULL)
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CLASS_EX(Animal,Dog){
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STATIC_EX(Animal,Dog)
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};
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static void Woof(Animal *THIS){
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printf("Woof!My name is %s!\n",THIS->name);
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}
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int Dog_reloadSt(StAnimal *THIS,void *PARAM){
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THIS->talk=(void *)Woof;
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return 0;
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}
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ASM_EX(Animal,Dog,NULL,NULL,Dog_reloadSt,NULL)
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int main(){
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Animal *a[]={
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(void*)newDog("Jack"),
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(void *)newCat("Lily"),
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//Still,you can use the style below
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NEW(Dog,"Mike"),
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NEW(Cat,"Lucy"),
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};
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int i=0;
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//for 0.9+
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StAnimal *f=ST((a[0]));
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//for 0.8 use the func below
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//StAnimal *f=ST((Dog*)(a[0]));
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for(i=0;i<4;++i){
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f->talk(a[i]);
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}
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for(i=0;i<4;++i){
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//this is for 0.9+
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DEL0(a[i]);
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//for 0.8+ you can use the func below
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//delDog((Dog**)&(a[i]),NULL);
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//for 0.8 only
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//DEL0(Dog,&((Dog*)a[i]));
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}
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return 0;
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}