sizeof(city_array) = 8, sizeof(char *) = 8

最新推荐文章于 2020-11-14 22:58:18 发布

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#include<stdio.h>
#include<stdlib.h>
#include<string.h>
/**
 * sizeof(city_array) = 8, sizeof(char *) = 8
 * count = sizeof(city_array) / sizeof(char *) = 1
 */
void print_city_array(int num, char **city_array){
	printf("sizeof(city_array) = %d, sizeof(char *) = %d\n", sizeof(city_array), sizeof(char *));
	printf("count = sizeof(city_array) / sizeof(char *) = %d\n", sizeof(city_array)/sizeof(char *));

	int i;
	for(i = 0; i < num; i++){
		puts(city_array[i]);
	}
}
/**
 * ==:sizeof(array) = 8, sizeof(int *) = 8, sizeof(array)/sizeof(int) = 2
 */
int get_total(int sum, int *array){
	printf("==:sizeof(array) = %d, sizeof(int *) = %d, sizeof(array)/sizeof(int) = %d\n",
			sizeof(array), sizeof(int *), sizeof(array)/sizeof(int) );

	int i, total = 0;
	for(i = 0; i < sum; i++)
		total += array[i];
	return total;
}

int main(int argc, char *argv[]) {
	char *city_array[] = {
			"beijing",
			"shanghai",
			"wuhan",
			"xian"
	};

	puts("==========main starting========");
	printf("sizeof(city_array) = %d, sizeof(char *) = %d\n", sizeof(city_array), sizeof(char *));
	printf("count = sizeof(city_array) / sizeof(char *) = %d\n", sizeof(city_array)/sizeof(char *));

	int i;
	for(i = 0; i < sizeof(city_array)/sizeof(char *); i++){
		puts(city_array[i]);
	}
	puts("==========main ending========");
	print_city_array(4, city_array);

	int array[] = {1, 9, 2, 8, 3, 7, 4, 6, 5};
	int total = get_total(9, array);
	printf("total = %d\n", total);
	return 0;
}