C语言--通用类型栈

#include 
#include 
#include 
#include 

typedef struct {
    void *elems;
    int elemSize;
    int logicLen;
    int allocLen;
}stack;

void StactNew(stack *,int);
void StackDispose(stack *);
void StackPush(stack *,void *);
void StackPop(stack *,void *);

void StackNew(stack *s,int elemSize)
{
    s->elemSize=elemSize;
    s->logicLen=0;
    s->allocLen=4;
    s->elems=malloc(s->allocLen*s->elemSize);
    assert(s->elems!=NULL);
}

void StackDispose(stack *s)
{
    free(s->elems);
}

void StackPush(stack *s,void *elemAddr)
{
    if(s->logicLen==s->allocLen){
        s->allocLen*=2;
        s->elems=realloc(s->elems,s->allocLen*s->elemSize);
        assert(s->elems!=NULL);
    }
    void *target;
    target=(char *)s->elems+s->logicLen*s->elemSize;
    memcpy(target,elemAddr,s->elemSize);
    s->logicLen++;
}

void StackPop(stack *s,void *elemAddr)
{
    assert(s->logicLen>0);
    s->logicLen--;
    void *source;
    source=(char *)s->elems+s->logicLen*s->elemSize;
    memcpy(elemAddr,source,s->elemSize);
}
//字符串栈存储示例
int main()
{
    stack stringStack;
    char *name[]={"Apig","Bdog","Cfox"};
    StackNew(&stringStack,sizeof(char *));
    for(int i=0;i<3;i++){
        StackPush(&stringStack,&name[i]);
    }
    for(int i=0;i<3;i++){
        char *getS;
        StackPop(&stringStack,&getS);
        printf("The string %d is %s.\n",i,getS);
    }
    StackDispose(&stringStack);

    return 0;
}

转载于:https://www.cnblogs.com/jerehao/p/5539845.html