程序大概如下：

#include

#include

#include

#include

#include

#define MALLOC(num,type) (type*)alloc((num)*sizeof(type))

#define REALLOC(ptr,num,type) (type*)re_alloc(ptr,(num)*sizeof(type))

double *x；

int count =0;

void *alloc(size_t size)

{

void *new_mem;

new_mem = malloc (size);

if(new_mem == NULL)

{

printf("Out of memory!\n");

exit(1);

}

return new_mem;

}

void *re_alloc(void *ptr, size_t new_size)

{

void *renew_mem;

renew_mem = realloc(ptr,new_size);

if((renew_mem == NULL)||(renew_mem == ptr))

{

printf("renew is out of memory\n");

exit(1);

}

return renew_mem;

}

void mem_free(void *ptr)

{

if (ptr != NULL)

free(ptr);

}

int main()

{

......

x = MALLOC(N1, double);

for(i=0;i{

x[count] = A; //为x赋值

count ++;

}

N = N1 +N2;

x = REALLOC(x, N, double);

for(i=0;i{

x[count] = A; //为x赋值

count ++;

}

mem_free(x);

}

在linux下运行，报错，但是仍然可以输出正确结果，报错如下：

*** glibc detected *** ./main: double free or corruption (!prev): 0x0000000000cc7910 ***

======= Backtrace: =========

/lib64/libc.so.6[0x395d875366]

/lib64/libc.so.6[0x395d877e93]

/lib64/libc.so.6(fclose+0x14d)[0x395d865add]

./main[0x402a6c]

/lib64/libc.so.6(__libc_start_main+0xfd)[0x395d81ecdd]

./main[0x400a99]

======= Memory map: ========

。。。。。

求帮助，急、、急、、、

加入输出的主程序如下：

int main()

{

x = MALLOC(N1, double); //其它变量类似

for(i=0;i{

x[count] = A;

y[count] = B;

..... //多个类似的指针变量赋值

count ++;

fprintf(fout, "%12.4f%12.4f\n", x[count], y[count]);

}

N = N1 +N2;

x = REALLOC(x, N, double); //其它变量类似

for(i=0;i{

x[count] = A;

y[count] = B;

count ++;

fprintf(fout, "%12.4f%12.4f\n", x[count], y[count]);

}

for(i=0;i{

fprintf(fout2, "%12.4f%12.4f\n", x[i], y[i]);

}

mem_free(x);

mem_free(y);

....

}