C语言中数组转化为字符串的方法

#include<stdio.h>
#include <stdlib.h>
#include <string.h>
#define NR(x)  (sizeof(x)/sizeof(x[0]))
void  ToString(char array[] , char array_size) ;
int main(void)
{
	//1.
	char *p = "hello";
	char array[]={1,'F','P',4,5,'U',7,'I',9,'r','e'};
	char buffer[20] = {0};
	int i ; 
	for(i = 0 ; i < NR(array) ; i++){
		if(array[i] < 60) {
			buffer[i] = array[i] + '0' ;
		}
		else
		{
			buffer[i] = array[i] ;	
		}
	}
	printf("%s\n",buffer); 
	return 0 ;	
	
}