问题:
A、fund(int *x, int *y){ *x=*x+*y; *y=*x-*y; *x=*x-*y;}
B、funb(int x, int y){ int t;t=x; x=y; y=t;}
C、funa(int *x, int *y){ int *p;*p=x; *x=*y; *y=*p;}
D、func(int *x, int *y){ *x=*y; *y=*x;}
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