Understanding the execution order of (function(){})() in jQuery_jquery

Generally speaking, the sequence is as follows: first calculate the first parenthesis, find that the expression inside is a function, return the reference (pointer) of the anonymous function, and the last parenthesis is the actual parameter and union of the anonymous function. implement.
Example:
Calculate the sum of two numbers.
JavaScript:

Copy code The code is as follows:

(function sum(a,b ){ //sum can also be removed here and appear in the form of an anonymous function
alert(a b);
})(7,8);

C:

Copy code The code is as follows:

int sum(int a,int b){return a b;}
void main(){
int (*pt)(int,int); //The function pointer is defined here
pt = sum;
printf("%d",pt(7 8) );
}