malloc的用法和意义
int *p;p = (int*)malloc(sizeof(int) * 128);//分配128个(可根据实际需要替换该数值)整型存储单元,//并将这128个连续的整型存储单元的首地址存储到指针变量p中double *pd = (double*)malloc(sizeof(double) * 12);//分配12个double型存储单元,//并将首地址存储到指针变量pd中https://blog.csdn.net/chf_1/article/details/78688557

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