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func () { int x; 局部变量x的作用域 很明确 ...... }
int x=1; func () { x=x+1; } func1 () { x=x-1; } main () { }
main () { extern int a,b; printf ("mIn is %d\n",min(a,b)); } int a=1,b=2; int min (x,y) int x,y; { int z; z=x<y?x:y; return(z); }
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原文地址:http://www.cnblogs.com/zhsh641/p/Basic_C_1.html