I am learning C language. This is my code run in linux.

#include <stdio.h>

int main(int argc, char *argv[]){
    char string[] = "Rudolph is 12 years old";
    char str[20] = {0}
    char i;
    sscanf(string, "%s %*s %d", str, &i);
    printf("%s -> %dn", str, i);

    return 0;
}

My expected result is:
Rudolph -> 12

But I got the result:
-> 12

I want to know what happened and why?

I try to change char i to int i

than I got expected result

But I don’t known why char i can’t let me get expected result.