#include <stdio.h>

typedef struct
{
	int i;
	float a;
	char c;
	char *str;
} my_struct_t;

int main()
{
	my_struct_t struct_t;

    struct_t.i = 10;
    struct_t.a = 1.0f;
    struct_t.c = 'a';
    struct_t.str = "hello";

    FILE *file = NULL;

    file = fopen("test", "w" );
    if( file )
    {
        fprintf( file, "%d %f %c %s", struct_t.i, struct_t.a, struct_t.c, struct_t.str );
        fclose( file );
    }
    else
    {
        printf("Error!");
        fclose(file);
    }
    return 0;
}