C language defines a structure in one function. How to use it in another function? Or how to define a global structure so that all functions can be called?

The structure defined in a function is a local variable and cannot be used outside the function
You need to define a global variable outside the function
For example, outside the function:
struct s{
int a;
}s1,s2;
In this way, two global structures S1 and S2 are defined. These two structures can be used in all functions. Of course, local variables with the same name can no longer be defined in the functions that use them, otherwise local variables will be used

In the three elements of function, when the corresponding rule and domain are the same, is it the same function

Yes, because the range is determined by the domain and the corresponding rule

The concept of function and its three elements (24 14:11:36)
If the domain of F (x) is "0,1", then the domain of F (x + 2) is:

F (x + 2) replaces x with x + 2. Now the definition field of F (x) is "0,1", which means that x + 2 is in [0,1], that is, 0

X times (five sixths plus five eighths) equals seven twentieth
solve equations

x*(5/6+5/8)=7/20
x*(20/24+15/24)=7/20
x*35/24=7/20
x=7/20*24/35
x=2.4

Please use the unequal sign to indicate the following relations: (1) a is a non negative real number; (2) the real number a is less than 3, but not less than - 2; (3) the absolute value of the difference between a and B is greater than 2,
Add the previous sentence, and less than or equal to 9

Hello, the answer is as follows:
1.a≥0
1.-2≤a＜3
3.9 ≥ |a - b|＞2

If a is a real number, then the result of adding a to the absolute value of a is that A. must be greater than 0, B. cannot be less than 0, C. may be less than 0, D. greater than 0
If a is a real number, then the result of adding a to the absolute value of a is
A. Must be greater than 0
B. It cannot be less than 0
C. May be less than 0
D. Greater than 0 or equal to 0 or less than 0

If a is a real number, then the result of adding a to the absolute value of a is B. It can't be less than 0

The sum of all real numbers whose absolute value is less than root 8 is?

The sum of all real numbers whose absolute value is less than root 8 is 0

Write the negation of proposition. All rectangles are parallelograms. Every prime number is odd. The absolute value of some real numbers is positive
A parallelogram is a diamond

1
All rectangles are parallelograms
There is a rectangle that is not a parallelogram
two
Every prime is odd
There is a prime that is not an odd number 3
three
Some real numbers have positive absolute values
The absolute value of all real numbers is not positive
four
Some parallelograms are rhombus
All parallelograms are not diamonds

"All prime numbers are odd" write the inverse proposition, no proposition, and inverse no proposition (in the form of q if P)

Inverse proposition: if a number is odd, then the number is prime
No proposition: if a number is not prime, then the number is not odd
Inverse no proposition: if a number is not odd, then the number is not prime

Is prime odd a proposition

Is a proposition, can judge right and wrong can be summed up as a proposition
This is a false proposition because there are two primes that are not odd
Its inverse proposition is odd, prime and false, because 9.15... Is not prime

C language defines a structure in one function. How to use it in another function? Or how to define a global structure so that all functions can be called?