c语言释放结构体数组内存空间,讨教怎么样为C语言的结构体数组分配/释放内存？谢谢...-优快云博客

本文探讨了如何在C语言中为结构体数组动态分配和释放内存。示例代码展示了如何使用malloc为结构体数组分配内存，初始化元素，并通过free释放内存。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

讨教怎么样为C语言的结构体数组分配/释放内存？谢谢

struct emp

{

char name[10];

float salary;

};

int main(int argc,char* argv[])

{

struct emp array_emp[1000000];

解决方案

http://blog.youkuaiyun.com/q345852047/article/details/7348038

#include

struct emp {

char name[10];

float salary;

};

int main() {

struct emp *array_emp;

array_emp=malloc(1000000*sizeof(struct emp));

if (NULL==array_emp) {

printf("Can not malloc 1000000 emp!\n");

return 1;

}

strcpy(array_emp[999999].name,"123456789");

array_emp[999999].salary=50000.0f;

free(array_emp);

return 0;

}

第12行array_emp=malloc(1000000*sizeof(struct emp));

应改为

array_emp=(struct emp *)malloc(1000000*sizeof(struct emp));

也许PRO*C和标准C不同。每弄过PRO*C，爱莫能助。

#include

struct emp {

char name[10];

float salary;

};

int main() {

struct emp *array_emp;

int i;

array_emp=(struct emp *)malloc(1000000*sizeof(struct emp));

if (NULL==array_emp) {

printf("Can not malloc 1000000 emp!\n");

return 1;

}

for (i=0;i<1000000;i+=10000) {

sprintf(array_emp[i].name,"%d",i);

array_emp[i].salary=(float)i;

}

for (i=0;i<1000000;i+=10000) {

printf("%d %s %f\n",i,array_emp[i].name,array_emp[i].salary);

}

free(array_emp);

return 0;

}

//0 0 0.000000

//10000 10000 10000.000000

//20000 20000 20000.000000

//30000 30000 30000.000000

//40000 40000 40000.000000

//50000 50000 50000.000000

//60000 60000 60000.000000

//70000 70000 70000.000000

//80000 80000 80000.000000

//90000 90000 90000.000000

//100000 100000 100000.000000

//110000 110000 110000.000000

//120000 120000 120000.000000

//130000 130000 130000.000000

//140000 140000 140000.000000

//150000 150000 150000.000000

//160000 160000 160000.000000

//170000 170000 170000.000000

//180000 180000 180000.000000

//190000 190000 190000.000000

//200000 200000 200000.000000

//210000 210000 210000.000000

//220000 220000 220000.000000

//230000 230000 230000.000000

//240000 240000 240000.000000

//250000 250000 250000.000000

//260000 260000 260000.000000

//270000 270000 270000.000000

//280000 280000 280000.000000

//290000 290000 290000.000000

//300000 300000 300000.000000

//310000 310000 310000.000000

//320000 320000 320000.000000

//330000 330000 330000.000000

//340000 340000 340000.000000

//350000 350000 350000.000000

//360000 360000 360000.000000

//370000 370000 370000.000000

//380000 380000 380000.000000

//390000 390000 390000.000000

//400000 400000 400000.000000

//410000 410000 410000.000000

//420000 420000 420000.000000

//430000 430000 430000.000000

//440000 440000 440000.000000

//450000 450000 450000.000000

//460000 460000 460000.000000

//470000 470000 470000.000000

//480000 480000 480000.000000

//490000 490000 490000.000000

//500000 500000 500000.000000

//510000 510000 510000.000000

//520000 520000 520000.000000

//530000 530000 530000.000000

//540000 540000 540000.000000

//550000 550000 550000.000000

//560000 560000 560000.000000

//570000 570000 570000.000000

//580000 580000 580000.000000

//590000 590000 590000.000000

//600000 600000 600000.000000

//610000 610000 610000.000000

//620000 620000 620000.000000

//630000 630000 630000.000000

//640000 640000 640000.000000

//650000 650000 650000.000000

//660000 660000 660000.000000

//670000 670000 670000.000000

//680000 680000 680000.000000

//690000 690000 690000.000000

//700000 700000 700000.000000

//710000 710000 710000.000000

//720000 720000 720000.000000

//730000 730000 730000.000000

//740000 740000 740000.000000

//750000 750000 750000.000000

//760000 760000 760000.000000

//770000 770000 770000.000000

//780000 780000 780000.000000

//790000 790000 790000.000000

//800000 800000 800000.000000

//810000 810000 810000.000000

//820000 820000 820000.000000

//830000 830000 830000.000000

//840000 840000 840000.000000

//850000 850000 850000.000000

//860000 860000 860000.000000

//870000 870000 870000.000000

//880000 880000 880000.000000

//890000 890000 890000.000000

//900000 900000 900000.000000

//910000 910000 910000.000000

//920000 920000 920000.000000

//930000 930000 930000.000000

//940000 940000 940000.000000

//950000 950000 950000.000000

//960000 960000 960000.000000

//970000 970000 970000.000000

//980000 980000 980000.000000

//990000 990000 990000.000000

每弄过→没弄过

struct Point{

int x;

int y;

}

Point* pt;

pt = (Point*)malloc(10 * sizeof(Point));

//do sth

free(pt);

然后就可以用下标来操作了

pt[0].x = 12;

来看看11楼的回答

引用:

Quote: 引用:

每弄过→没弄过

static struct emp

{

char name[10];

float salary;

};

static struct emp array_emp[1000000];

高手，假如这样定义，是可以SELECT INTO :array_emp 100万条记录的

但是您的定义方法不行，没法SELECT INTO 100万行，只能INTO 1条记录

是原因是只有1条数据的缘故吧

高手本人这样定义似乎可以了，这样定义，本人没法根据表的记录数来分配内存了，必须写死记录数了？

struct emp

{

char name[1000000][10];

float salary[1000000];

};

但是和如下定义有什么区别马？

struct emp_record

{

char name[10];

float salary;

};

个人感觉本质上来说没区别，但是一般不选择上面的，不方便。

引用:

#include

struct emp {

char name[10];

float salary;

};

int main() {

struct emp *array_emp;

array_emp=malloc(1000000*sizeof(struct emp));

if (NULL==array_emp) {

printf("Can not malloc 1000000 emp!\n");

return 1;

}

strcpy(array_emp[999999].name,"123456789");

array_emp[999999].salary=50000.0f;

free(array_emp);

return 0;

}

看到5w的salary，其它的就不想看了，人生的差距最大不过如此……

c语言 释放结构体数组内存空间,讨教怎么样为C语言的结构体数组分配/释放内存？谢谢...

c语言释放结构体数组内存空间,讨教怎么样为C语言的结构体数组分配/释放内存？谢谢...