数据结构C语言小问题

Question

#include<stdio.h>
#include<stdlib.h>
#include"001.h"
#pragma once
void SeqListInit(SL2* ps)//初始化
{
    ps->a = NULL;
    ps->size = ps->capacity = 0;
}

void SeqListPushBack(SL2* ps, SLDateType x)//尾插一个数据
{
    if (ps->size=ps->capacity)
    {
        int newcapacity = ps->capacity == 0 ? 4 : ps->capacity * 2;
        SLDateType* tmp = (SLDateType*)realloc(ps->a,newcapacity*sizeof(SLDateType));
        if (tmp=NULL)
        {
            printf("realloc fail\n");
            exit(-1);
        }
        ps->a = tmp;
        ps->capacity = newcapacity;
    }
    ps->a[ps->size] = x; 
    ps->size++;
}

void SeqListPrint(SL2* ps)
{
    for (int i = 0; i < ps->size; i++)
    {
        printf("%d\n", ps->a[i]);
    }
}
void testseqlist()
{
    SL2 s1;
    SeqListInit(&s1);
    SeqListPushBack(&s1, 1);
    SeqListPushBack(&s1, 2);
    SeqListPushBack(&s1, 3);
    SeqListPushBack(&s1, 4);
    SeqListPrint(&s1);
}
int main()
{
    testseqlist();
    return 0;
}

在这出现了问题

这是头文件里的代码

#pragma once
#define N 100
#include<stdio.h>
#include<stdlib.h>
typedef int SLDateType;

//静态顺序表
    typedef  struct SeqList1
    {
        SLDateType a[N];
        int size;//表示存储了多少个数据
    }SL1;
    void SeqListPrint(SL1* ps);//打印
    void SeqListInit(SL1* ps);
    void SeqListPushBack(SL1*ps,SLDateType x);//尾插
    void SeqListPushFront(SL1* PS, SLDateType);//头插
    void SeqListPopBack(SL1* PS);//尾删
    void SeqListPopFront(SL1* PS);//头删
//动态顺序表
    typedef  struct seqlist2
    {
        SLDateType* a;
        int size;//表示存储了多少个数据
        int capacity;//数组实际能存的数据空间有多大

    }SL2;

不知道问题出在哪

Answer 1

两处问题，在.cpp文件里：
第13行： if (ps->size=ps->capacity) 应修改为：if (ps->size == ps->capacity)
第17行：if (tmp=NULL) 应修改为：if (tmp == NULL)

#include<stdio.h>
#include<stdlib.h>
#include"001.h"
#pragma once
void SeqListInit(SL2* ps)//初始化
{
    ps->a = NULL;
    ps->size = ps->capacity = 0;
}

void SeqListPushBack(SL2* ps, SLDateType x)//尾插一个数据
{
    if (ps->size == ps->capacity)  //if (ps->size = ps->capacity) 修改
    {
        int newcapacity = ps->capacity == 0 ? 4 : ps->capacity * 2;
        SLDateType* tmp = (SLDateType*)realloc(ps->a, newcapacity * sizeof(SLDateType));
        if (tmp == NULL)   //if (tmp = NULL)  修改
        {
            printf("realloc fail\n");
            exit(-1);
        }
        ps->a = tmp;
        ps->capacity = newcapacity;  
    }
    ps->a[ps->size] = x;
    ps->size++;
}

void SeqListPrint(SL2* ps)
{
    for (int i = 0; i < ps->size; i++)
    {
        printf("%d\n", ps->a[i]);
    }
}
void testseqlist()
{
    SL2 s1;
    SeqListInit(&s1);
    SeqListPushBack(&s1, 1);
    SeqListPushBack(&s1, 2);
    SeqListPushBack(&s1, 3);
    SeqListPushBack(&s1, 4);
    SeqListPrint(&s1);
}
int main()
{
    testseqlist();
    return 0;
}