This program who can understand, who can explain what is the meaning of this program? To solve the-CodePudding

#include
Int fun (intA)
{
Int b=0;
Static int c=3;
A=(c + +, b++);
Return (a);
}
The main ()
{
Int a=2, I, k;
for (i=0; i<2; I++)
K=fun (+);
Printf (" % d \ n ", k);
}

CodePudding user response:

The program is wrong:
Int fun (intA)
And
A=(c + +, b++);//a undefined

CodePudding user response:

The results should be
0
0

CodePudding user response:

The output is 0
The key is a=(c + +, b++); This sentence, the order of the comma operator is like this:
1, c and b values, participate in the comma operator operation, return the value of b to a
2, the implementation of c + 1 and + 1 b
Because b is temporary variables, each function call is initialize 0, so no matter what you a parameter incoming, comma operators always return the value of b