What you think about printing the string length without strlen() or loops in C? Is that possible? [closed]

Question

I was asked to fill in the blanks in order to make the program print the length of the string. The blank space is:

#include <stdio.h>
int main()
char str[101];
int strlen;
scanf(          );
printf("%d", strlen); 
return 0;
}

Now, I want to fill the blanks in the scanf() area. I think neither the strlen nor the loops can be used for this. What should I code to print the length?

Answer 1

It seems what you need is the following

scanf( "%100s%n", str, &strlen );

Pay attention to that using the name strlen for the variable that corresponds to the standard string function strlen is a bad idea.

Answer 2

Another possibility (though not quite exactly filling in your blanks) is:

#include <stdio.h>

int main()
{
    char str[101];
    int len;
    printf("enter a string: "); fflush(stdout);
    if(scanf("%100s", str) == 1) {
        printf("the length of the string \"");
        len = printf("%s", str);
        printf("\" is %d\n", len);
    }
}