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#include <stdio.h>
#include <cs50.h>
string my_function(string s);
string global = "SUPERMAN!";
int main(void)
// Passing global as an argument
// changes the output because
// we are passing by value.
global = "FLASH";
printf("the global variable is %s\n", global);
string my_function(string s)
s = "BATMAN!";
return s;
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