Can you please tell me where are the problems here?

Question

A-write a code that interacts with user as follows: 1.1 At the beginning of the code or any reset print : (function with no inputs) “ welcome to my code my name is (your name) ,if you are a male enter 1 and if you are a female enter 2 “ 1.2 After you store the number in a variable , use as an input for another functions that has no output and prints “welcome Mr” or “welcome miss” (function with no output but has an input) 2. Get the birthdate
#include <stdio.h>
int gender();
int birth(g);
void welcoming(h);
int main()
{
int a,x,g,h;
x= gender();
welcoming(x);
a= birth(g);

}
int gender(void) {
printf("Welcome my name's Retaj");
printf("if you are a male enter 1 and if you are a female enter 2");
scanf("%d",&h);
return (h);
}
void welcoming(gender(void)){
if (h==1){
printf("Welcome Mr");
}
else {printf("Welcome Mrs");
}
}
int birth (int g){
printf("enter your birth date");
scanf("%d",&g);
int age=2018-g;
return (age);
}

Answer 1

Retag Tarek there are two errors in code as below :

1......
for function, int gender(void) ; variable h is not accessible... so, you need to declare first before you use itas below:
int h;

2.......
Function should be declared as below:
void welcoming(int h)

whatever you used is returns value... But that value cannot be passed as function argument while declaring... you must have variable like int h in function definition... you have already passed value while calling function...