53 lines
910 B
C
53 lines
910 B
C
#include <stdio.h>
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#include <stdlib.h>
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void print_arr(int *p, int size)
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{
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int i;
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printf("%s:%d\n", __FUNCTION__, sizeof(p));
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// out: 8 指针
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for (i = 0; i < size; i++)
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printf("%d ", *(p + i));
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printf("\n");
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}
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void func(int *p, int size)
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{
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int *tmp;
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for (int i = 0; i < size / 2; i++)
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{
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*tmp = *(p + i);
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*(p + i) = *(p + size - 1 - i);
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*(p + size - 1 - i) = *tmp;
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}
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}
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int main( )
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{
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int a[] = {1, 3, 5, 7, 9};
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// printf("%s:%d\n", __FUNCTION__, sizeof(a));
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// out: 20 5*4
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// print_arr(a, sizeof(a) / sizeof(*a));
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for (int i = 0; i < sizeof(a) / sizeof(*a); i++)
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{
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printf("%d ", a[i]);
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}
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printf("\n");
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func(a, sizeof(a) / sizeof(*a));
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for (int i = 0; i < sizeof(a) / sizeof(*a); i++)
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{
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printf("%d ", a[i]);
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}
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printf("\n");
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exit(0);
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} |