将值分配给使用malloc创建的2D数组 [英] Assigning values to 2D array created using malloc

问题描述

我使用malloc创建了2D字符数组，并一直试图将其值分配给'\ 0'.

I created a 2D character array using malloc and have been trying to assign its values to '\0'.

char **predicate_array = malloc(no_of_lines_in_data_map);
for(int i = 0; i < no_of_lines_in_data_map; i++){
    predicate_array[i] = malloc(1024 * sizeof(char));
    predicate_array[i][0] = '\0';
}

但是，当我打印输出时，我得到:

However, when I print the output I get:

predicate_array[0] = (P;

predicate_array[1] = 

predicate_array[2] = 

predicate_array[3] = 

predicate_array[4] = 

predicate_array[5] = 

predicate_array[6] = 

...

...

有人知道为什么第一个数组未设置为'\ 0'吗?

Would anyone know why the first array is not being set to '\0'?

谢谢.

推荐答案

第一个malloc的参数不适合您的2d数组.

the parameter of the first malloc don't fit your 2d-array.

如下修复

char **predicate_array = (char **)malloc(no_of_lines_in_data_map*sizeof(char *));

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