C中printf()的常用输出

1、输出整数：%d

int a = 10;
printf("%d\n",a);

2、输出无符号数：%u

unsigned int b = 25;
printf("%u\n",b);

3、输出十六进制数：%x

int hex = 0x25;
printf("%x\n",hex);

4、输出指针指向的地址：%p

int a = 0x12345678;
int *p = &a;
printf("%p\n",p);

5、输出字符串：%s

//char str[] = "abcde";
char *str = "abcde";
printf("%s\n",str);

6、输出单个字符：%c

char c = '1';
printf("%c\n",c);

7、输出二进制格式

void print_bin(int number){
    int bit = sizeof(int)*8;
    int i;
    for(i = bit - 1;i >= 0;i--){
        int bin = (number & (1 << i)) >> i;
        printf("%d", bin);
    }
    printf("\n");
}
int main(void){

    unsigned int b = 5;
    print_bin(b);
    return 0;
}

输出二进制需要用到自定义函数，效果如图

8、输出二进制无符号格式

/*输出二进制无符号数*/
void print_bin(unsigned int number){
    unsigned int bit = sizeof(unsigned int)*8;
    int i;
    for(i = bit - 1;i >= 0;i--){
        unsigned int bin = (number & (1 << i)) >> i;
        printf("%u", bin);
    }
    printf("\n");
}