Structure Member Operator Error on Simple C Program - c

Question

I'm studying about structures, and having some error. I cannot figure out why. Please help me out.
#include <stdio.h>
struct data{
int x;
float y;
float z;
} info;
info.x = 100;
struct data *ptr;
ptr = &info;
(*ptr).y = 5.5;
(*ptr).z = 1.0;
int main(void)
{
printf("The first member's value is %d.\n", info.x);
printf("The second member's value is %.1f.\n", info.y);
printf("The third member's value is %.1f.\n", info.z);
return 0;
}
The compiler error is
exercise112.c:10:5: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘.’ token
info.x = 100;
^
exercise112.c:13:1: warning: data definition has no type or storage class
ptr = &info;
^~~
exercise112.c:13:1: warning: type defaults to ‘int’ in declaration of ‘ptr’ [-Wimplicit-int]
exercise112.c:13:1: error: conflicting types for ‘ptr’
exercise112.c:12:14: note: previous declaration of ‘ptr’ was here
struct data *ptr;
^~~
exercise112.c:13:7: warning: initialization makes integer from pointer without a cast [-Wint-conversion]
ptr = &info;
^
exercise112.c:13:7: error: initializer element is not computable at load time
exercise112.c:15:7: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘.’ token
(*ptr).y = 5.5;
^
exercise112.c:16:7: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘.’ token
(*ptr).z = 1.0;
^
Did I do definition, declaration, initialization or anything wrong?
I cannot figure out what the error messages are saying. what do they
mean?