PBC element_to_bytes错误“打印垃圾”无法将元素转换为字符串

Question

I am getting garbage values when I convert an element_t to string. What could be the reason?

element_printf("element_a: %B",a);

//int len = element_length_in_bytes(a);
unsigned char* strA= (unsigned char*)malloc(element_length_in_bytes(a)*sizeof(char));
element_to_bytes(strA,a);
printf("\n\n\n a: %s\n\n\n",strA);

The output is:

element_a: 676879270129030191324293305775237511254264666883


 a: v�P��?�P�+��a�����[

I want the normal a to print as the element_a. What am I missing?

Thanks, Yogesh

Answer 1

You are not getting garbage and you are not converting your element to a string. You are passing an array of bytes to printf and tell this function to interpret them as characters. No surprise this does not work. Try element_snprint()

element_printf("element_a: %B",a);

size_t s = (size_t) element_length_in_bytes(a);
char* strA= (char*)malloc(s*sizeof(char));
element_snprint(strA, s, a)
printf("\n\n\n a: %s\n\n\n",strA);