C語言printf（）函數的格式化字符串

原文鏈接：
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); /*結果輸出十進制整數a=1234*/     printf("a=%6d\n",a); /*結果輸出6位十進制數a=1234*/     printf("a=%06d\n",a); /*結果輸出6位十進制數a=001234*/     printf("a=%2d\n",a); /*a超過2位,按實際值輸出a=1234*/     printf("*i=%4d\n",*i); /*輸出4位十進制整數*i=12*/     printf("*i=%-4d\n",*i); /*輸出左對齊4位十進制整數*i=12*/     printf("i=%p\n",i); /*輸出地址i=06E4*/     printf("f=%f\n",f); /*輸出浮點數f=3.141593*/     printf("f=%6.4f\n",f); /*輸出6位其中小數點后4位的浮點數     f=3.1416*/     printf("x=%lf\n",x); /*輸出長浮點數x=0.123457*/     printf("x=%18.16lf\n",x); /*輸出18位其中小數點后16位的長浮點數x=0.1234567898765432*/     printf("c=%c\n",c); /*輸出字符c=A*/     printf("c=%x\n",c); /*輸出字符的ASCII碼值c=41*/     printf("s[]=%s\n",s); /*輸出數組字符串s[]=Hello,Comrade*/     printf("s[]=%6.9s\n",s); /*輸出最多9個字符的字符串s[]=Hello,Co*/     printf("s=%p\n",s); /*輸出數組字符串首字符地址s=FFBE*/     printf("*p=%s\n",p); /*輸出指針字符串p=Howdoyoudo*/     printf("p=%p\n",p); /*輸出指針的值p=0194*/     getch();     return 0; }