Basic knowledge you should __allways__ keep in mind !!!
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1).
int 声明的变量默认是带符号的,如果需要无符号整型,必须明确声明 unsigned int.
$ cat helloworld.c
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
int i = 2147483645;
int j = 2147483649;
printf("hello world ! %4d %4d\n", i,j);
return 0;
}
$ ./helloworld
hello world ! 2147483645 -2147483647
函数中的数组参数
http://blog.sina.com.cn/s/blog_5365fc4d0100lvod.html
2).
以下代码的输出 ?
#include <stdio.h>#include <stdlib.h>#include <stdbool.h>int main(int argc, char* argv[]){bool fbUsed = 5;printf("fbUsed = %d \n", fbUsed);return 0;}
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