bash-4.1$ gcc -o sscanf_t sscanf_t.c

bash-4.1$ ./sscanf_t
i1=1, l1=23, c1=f, f1=3.141590

bash-4.1$ cat sscanf_t.c
#include <stdio.h>
#include <string.h>

int main()
{
	char msg[50];
	int i1;
	float f1;
	char c1;
	long l1;

	memset(msg, 0, sizeof(msg));
	strcpy(msg, "1 23 f 3.14159");

	sscanf(msg, "%i %li %c %f", &i1, &l1, &c1, &f1);

	printf("i1=%i, l1=%li, c1=%c, f1=%f\n", i1, l1, c1, f1);
}