C fwrite appearently doesn't write numbers - c

Question

I'm trying to write a struct into a .txt file, but fwrite seems to not work as expected: I expected the file file.txt to show Jhonny 18 10.0, but it doesn't, am I missing something?
Here's my code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define FILENAME "file.txt"
typedef struct {
char name[32];
int age;
float value;
} Test_struct;
int main(int argc, char** argv)
{
Test_struct test;
strcpy(test.name, "Jhonny");
test.age = 18;
test.value = 10.0;
FILE* file = fopen(FILENAME, "w");
if (file == NULL)
{
fprintf(stderr, "\nAn error occurred while opening the file\n");
return -1;
}
if (fwrite(&test, sizeof(test), 1, file) < 0)
return -1;
fclose(file);
return 0;
}
And here's the resulting file:
I've followed this tutorial.

Answer 1

It turned out that fwrite() isn't the right function to do what I want (write to a .txt file), so WhozCraig suggested me to use fprintf() instead, and that's the resulting code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define FILENAME "file.txt"
typedef struct {
char name[32];
int age;
float value;
} Test_struct;
int main(int argc, char** argv)
{
Test_struct test;
strcpy(test.name, "Jhonny");
test.name[7] = '\0';
test.age = 18;
test.value = 10.0;
FILE* file = fopen(FILENAME, "w");
if (file == NULL)
{
fprintf(stderr, "\nAn error occurred while opening the file\n");
return -1;
}
if (fprintf(file, "%s %d %3.2f", test.name, test.age, test.value) < 0)
return -1;
fclose(file);
return 0;
}
Result: