C语言数组

1. 一维数组（1）

/*
============================================================================  
 Name        : Array.c  
 Author      : jiangkuan  
 Version     :  
 Copyright   : Your copyright notice  
 Description : Hello World in C, Ansi-style  
 ============================================================================  
 */  
  
#include <stdio.h>  
#include <stdlib.h>  
  
int main(void) {  
    int len = 10;  
    int arr[len];  
  
    for (int i = 0; i < len; i++) {  
        printf("index %d,and value is %d\n",i,arr[i]);  
    }  
    return EXIT_SUCCESS;  
}

运行结果：

2. 一维数组（2）

/*
 ============================================================================
 Name        : Array.c
 Author      : jiangkuan
 Version     :
 Copyright   : Your copyright notice
 Description : Hello World in C, Ansi-style
 ============================================================================
 */

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>

int main(void) {
	int32_t len = 10;
	int32_t arr[len];

	int arr1[] = {1,2,5,7,3,8};

	for(int a = 0;a < len;a++){
		arr[a] = 0;
	}

	for (int32_t i = 0; i < len; i++) {
		printf("index %d,and value is %d\n",i,arr[i]);
	}

	for(int i = 0;i < 6;i++){
		printf("%d\n",arr1[i]);
	}
	return EXIT_SUCCESS;
}

运行结果：

3. 二维数组

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>

int main(void) {

	int arr[3][4];
	int arr1[3][4] = {
			{1,2,3,4},
			{5,6,7,8},
			{9,10,11,12}
	};
	//clear arr
	for (int i = 0; i < 3; i++) {
		for(int j = 0;j < 4;j++){
			arr[i][j] = 0;
		}
	}

	for (int i = 0; i < 3; i++) {
		for(int j = 0;j < 4;j++){
			printf("index(%d,%d),%d\n",i,j,arr[i][j]);
		}
	}

	return EXIT_SUCCESS;
}

运行结果：

4. 字符串数组

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main(void) {

	char str[10] = {'H','e','\0','l','l','o','\0'};
	printf("string length is %ld ,and string is %s\n",strlen(str),str);

	memset(str,0,10);
	printf("string length is %ld ,and string is %s\n",strlen(str),str);

	char str1[] = "hello world";
	for(int i = 0;i < strlen(str1); i++){
		printf("[index:%d]%c\n",i,str1[i]);
	}
	printf(str1);

	return EXIT_SUCCESS;
}

运行结果：