Thread: Code Fragment

I was given this set of code in my Intro to C class, I have never programmed in C so I am still learning. I though the answer was 7, can someone please explain why the answer is 5 and what can be changed to allow foo to update a without using global variables?

Code:

int foo(int a){

a = 7;


}


int main(){

int a = 5;
foo(a);
printf("value is %d\n", a);

}

Is it because int foo(int a) should be void foo(int a) ?

1 int foo(int number){
2
3
4 number = 7;
5 return number;
6
7 }
8 #include <stdio.h>
9
10 int main(){
11
12 int a = 5;
13
14 printf("value is %d\n",foo( a));
15
16 }