C/C++ 二维指针 矩阵 初始化

//C++方式double **Q=new double*[row];    //初始化Q矩阵    for(int i=0;i<row;++i)        Q[i]=new double[POS_NUM]();    int **Path=new int*[row];   //初始化Path矩阵    for(int i=0;i<row;++i)        Path[i]=new int[POS_NUM]();// c方式         用于保存各阶段的最大概率值（len列，SDIM行）double ** ppValues = (double**)calloc(len, sizeof(double*));for(int i = 0; i < len; i++){ppValues[i] = (double*)calloc(SDIM, sizeof(double));}