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已知a=5,b=3, 下面( )代码能够实现交换,使得最终输出a=3,b=5 A. #include void swap(int x,int y); int main() { int a=5,b=3; swap(a,b); printf("a=%d,b=%d\n",a,b); return 0; } void swap(int x,int y) { int z=x; x=y; y=z; } B. #include void swap(int *x,int *y); int main() { int a=5,b=3; swap(&a,&b); printf("a=%d,b=%d\n",a,b); return 0; } void swap(int* x,int* y) { int z=*x; *x=*y; *y=z; } C. #include void swap(int *x,int *y); int main() { int a=5,b=3; swap(&a,&b); printf("a=%d,b=%d\n",a,b); return 0; } void swap(int* x,int* y) { int *z=*x; *x=*y; *y=z; } D. #include void swap(int *x,int *y); int main() { int a=5,b=3; swap(a,b); printf("a=%d,b=%d\n",a,b); return 0; } void swap(int* x,int* y); { int z=*x; *x=*y; *y=z; }