54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <math.h>
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#include <stdbool.h>
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// !数组是一种特殊的指针，数组名就是数组的首地址
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/*
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数组变量本身表达地址,所以
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int a[10]; int*p=a;//无需用&取地址
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但是数组的单元表达的是变量，需要用&取地址
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a == &a[O]
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[]运算符可以对数组做，也可以对指针做:
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p[0] <==>a[0]
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*运算符可以对指针做，也可以对数组做：
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*a= 25:
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数组变量是const的指针，所以不能被赋值
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int a[] <==> int * const a=...
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*/
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void minmax(int a[], int len, int *max, int *min);
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int main(void)
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{
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int c[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14, 16, 17, 21, 23, 55};
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int min, max;
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printf("min sizeof(c) = %lu\n", sizeof(c));
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minmax(c, sizeof(c) / sizeof(c[0]), &max, &min);
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printf("max = %d, min = %d\n", max, min);
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int *p = &min;
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printf("*p = %d\n", *p);
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printf("p[0]=%d\n", p[0]);
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return 0;
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}
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void minmax(int a[], int len, int *max, int *min)
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{
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int i;
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printf("minmax sizeof(a) = %lu\n", sizeof(a));
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*max = *min = a[0];
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for (i = 1; i < len; i++)
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{
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if (a[i] < *min)
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{
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*min = a[i];
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}
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if (a[i] > *max)
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{
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*max = a[i];
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}
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}
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} |