An example of converting integer to string in C language

For example, such a problem: Enter a positive integer and convert it to a positive integer. It can be implemented with sprintf and snprint. code show as below:

#include <stdio.h>
#include <string.h>

int a=0;
char buffer[8];

int main() {

	do {
		printf("input an unsigned int:");
		scanf("%u", &a);
	} while(a<0);

	snprintf(buffer, sizeof(buffer)+1, "%d", a);

	printf("length of buffer:%d, value is:%s\n ", strlen(buffer), buffer);

	return 0;
}