#include <stdio.h>int x = 77;void fn1(){ printf("fn1(): x=%d\n", x); }int main(){ int x = 10; if(x>0) { int x = 100; x /= 2; printf("if语句内, x=%d\n", x); } printf("main方法内, x=%d\n", x); fn1(); return 0;}最下面的fn1();是干嘛的额?
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