二维指针与三维指针动态分配内存

/*给二维数组(m*n)分配空间 */ char **a = (char **) malloc(m * sizeof(char * )); for(int i = 0; i < m; i++) a[i] = (char * )malloc(n * sizeof(char ));//a[i]即为*(a + i) /* 释放*/ for(int i = 0; i < m; ++i)

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