C语言printf（）函数的格式化字符串

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https://www.runoob.com/cprogramming/c-function-printf.html

#include <stdio.h> #include<string.h> int main(void) {     charc,s[20],*p;     inta=1234,*i;     floatf=3.141592653589;     doublex=0.12345678987654321;     p="Howdoyoudo";     strcpy(s,"Hello,Comrade");     *i=12;     c='\x41';     printf("a=%d\n",a); /*结果输出十进制整数a=1234*/     printf("a=%6d\n",a); /*结果输出6位十进制数a=1234*/     printf("a=%06d\n",a); /*结果输出6位十进制数a=001234*/     printf("a=%2d\n",a); /*a超过2位,按实际值输出a=1234*/     printf("*i=%4d\n",*i); /*输出4位十进制整数*i=12*/     printf("*i=%-4d\n",*i); /*输出左对齐4位十进制整数*i=12*/     printf("i=%p\n",i); /*输出地址i=06E4*/     printf("f=%f\n",f); /*输出浮点数f=3.141593*/     printf("f=%6.4f\n",f); /*输出6位其中小数点后4位的浮点数     f=3.1416*/     printf("x=%lf\n",x); /*输出长浮点数x=0.123457*/     printf("x=%18.16lf\n",x); /*输出18位其中小数点后16位的长浮点数x=0.1234567898765432*/     printf("c=%c\n",c); /*输出字符c=A*/     printf("c=%x\n",c); /*输出字符的ASCII码值c=41*/     printf("s[]=%s\n",s); /*输出数组字符串s[]=Hello,Comrade*/     printf("s[]=%6.9s\n",s); /*输出最多9个字符的字符串s[]=Hello,Co*/     printf("s=%p\n",s); /*输出数组字符串首字符地址s=FFBE*/     printf("*p=%s\n",p); /*输出指针字符串p=Howdoyoudo*/     printf("p=%p\n",p); /*输出指针的值p=0194*/     getch();     return 0; }