数组不初始化的默认值

#include <iostream>
using namespace std;
int a[10];
char b[10];
int main()
{
for (int i = 0; i < 10; i++)            //int全局数组不初始化默认为0
{
cout << a[i];
}
cout << endl;

int c[10];
for (int i = 0; i < 10; i++)            //局部数组不初始化，是随机值
{
cout << c[i];
}
cout << endl;

int d[10] = { 0 };
for (int i = 0; i < 10; i++)            //为0，未被显式初始化的元素默认为0，字符数组则是'\0'
{
cout << d[i];
}
cout << endl;

cout << b << endl;                     //按字符串方式输出，输出为空，不是空格，可以看出未初始化的全局数组元素为'\0'
for (int i = 0; i < 10; i++)            //单个输出全为a
{
cout << b[i];
}
cout << endl;

char e[10] = { 'b' };
cout << e << endl;                     //按字符串方式输出，输出为b，可见未被显式初始化的元素为'\0'
for (int i = 0; i < 10; i++)           //char局部数组，单个元素输出结果为baaaaaaaaa
{
cout << e[i];
}
cout << endl;
char f[10];                            //char局部数组不初始化，输出为烫烫烫烫烫
for (int i = 0; i < 10; i++)
{
cout << f[i];
}
cout << endl;
return 0;
}