Void fun ()
{a= 100, b = 200}// Local variables A and B will not affect A and B in MAIN, but only change global variables A and B..
Master ()
{int a=5，b = 7； //local variables a, b
Fun ()
printf("%d%d\n "，a，b)； //local variables a and b, mask global variables a and b.
}int a，b； //global variables a, b
Void fun ()
{a= 100, b = 200}// Local variables A and B will not affect A and B in MAIN, but only change global variables A and B..
Master ()
{int a=5，b = 7； //local variables a, b
Fun ()
printf("%d%d\n "，a，b)； //local variables a and b, mask global variables a and b.
}int a，b； //global variables a, b
Void fun ()
{a= 100, b = 200}// Local variables A and B will not affect A and B in MAIN, but only change global variables A and B..
Master ()
{int a=5，b = 7； //local variables a, b
Fun ()
printf("%d%d\n "，a，b)； //local variables a and b, mask global variables a and b.
}int a，b； //global variables a, b
Void fun ()
{a= 100, b = 200}// Local variables A and B will not affect A and B in MAIN, but only change global variables A and B..
Master ()
{int a=5，b = 7； //local variables a, b
Fun ()
printf("%d%d\n "，a，b)； //local variables a and b, mask global variables a and b.
}
Answer:
You defined int a and b from the beginning;
This A and B play a role in your whole document.
However, you defined a and b in the main function;
Then all A and B you use in the main function are locally defined A and B, because the global variables A and B are blocked in the main function.
You can change it like this, and you will understand:
# include & ltstdio.h & gt
int a，b；
Void fun ()
{a= 100，b = 200
Printf ("global variables A and B are:% d,% d \ n", A and B respectively);
}
Master ()
{int a=5，b = 7；
Fun ()
Printf (local variables A and B defined in "Main function is:% d,% d \ n", which are A and B respectively);
}
Knowing that the rain is silent, the answer is:
You defined int a and b from the beginning;
This A and B play a role in your whole document.
However, you defined a and b in the main function;
Then all A and B you use in the main function are locally defined A and B, because the global variables A and B are blocked in the main function.
You can change it like this, and you will understand:
# include & ltstdio.h & gt
int a，b；
Void fun ()
{a= 100，b = 200
Printf ("global variables A and B are:% d,% d \ n", A and B respectively);
}
Master ()
{int a=5，b = 7；
Fun ()
Printf (local variables A and B defined in "Main function is:% d,% d \ n", which are A and B respectively);
}
Knowing that the rain is silent, the answer is:
You defined int a and b from the beginning;
This A and B play a role in your whole document.
However, you defined a and b in the main function;
Then all A and B you use in the main function are locally defined A and B, because the global variables A and B are blocked in the main function.
You can change it like this, and you will understand:
# include & ltstdio.h & gt
int a，b；
Void fun ()
{a= 100，b = 200
Printf ("global variables A and B are:% d,% d \ n", A and B respectively);
}
Master ()
{int a=5，b = 7；
Fun ()
Printf (local variables A and B defined in "Main function is:% d,% d \ n", which are A and B respectively);
}
Knowing that the rain is silent, the answer is:
You defined int a and b from the beginning;
This A and B play a role in your whole document.
However, you defined a and b in the main function;
Then all A and B you use in the main function are locally defined A and B, because the global variables A and B are blocked in the main function.
You can change it like this, and you will understand:
# include & ltstdio.h & gt
int a，b；
Void fun ()
{a= 100，b = 200
Printf ("global variables A and B are:% d,% d \ n", A and B respectively);
}
Master ()
{int a=5，b = 7；
Fun ()
Printf (local variables A and B defined in "Main function is:% d,% d \ n", which are A and B respectively);
}
Knowing that the rain is silent, the answer is:
You defined int a and b from the beginning;
This A and B play a role in your whole document.
However, you defined a and b in the main function;
Then all A and B you use in the main function are locally defined A and B, because the global variables A and B are blocked in the main function.
You can change it like this, and you will understand:
# include & ltstdio.h & gt
int a，b；
Void fun ()
{a= 100，b = 200
Printf ("global variables A and B are:% d,% d \ n", A and B respectively);
}
Master ()
{int a=5，b = 7；
Fun ()
Printf (local variables A and B defined in "Main function is:% d,% d \ n", which are A and B respectively);
}
Knowing that the rain is silent, the answer is:
You defined int a and b from the beginning;
This A and B play a role in your whole document.
However, you defined a and b in the main function;
Then all A and B you use in the main function are locally defined A and B, because the global variables A and B are blocked in the main function.
You can change it like this, and you will understand:
# include & ltstdio.h & gt
int a，b；
Void fun ()
{a= 100，b = 200
Printf ("global variables A and B are:% d,% d \ n", A and B respectively);
}
Master ()
{int a=5，b = 7；
Fun ()
Printf (local variables A and B defined in "Main function is:% d,% d \ n", which are A and B respectively);
}
Know the rain and silence