C語言printf（）函數的格式化字串

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原文連結：
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);       /*結果輸出十進位整數a=1234*/    printf("a=%6d\n",a);      /*結果輸出6位十進位數a=1234*/    printf("a=%06d\n",a);     /*結果輸出6位十進位數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位十進位整數*i=12*/    printf("*i=%-4d\n",*i);   /*輸出靠左對齊4位十進位整數*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位其中小數點後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位其中小數點後16位的長浮點數x=0.1234567898765432*/    printf("c=%c\n",c);       /*輸出字元c=A*/    printf("c=%x\n",c);       /*輸出字元的ASCII碼值c=41*/    printf("s[]=%s\n",s);     /*輸出數組字串s[]=Hello,Comrade*/    printf("s[]=%6.9s\n",s);  /*輸出最多9個字元的字串s[]=Hello,Co*/    printf("s=%p\n",s);       /*輸出數組字串首字元地址s=FFBE*/    printf("*p=%s\n",p);      /*輸出指標字串p=Howdoyoudo*/    printf("p=%p\n",p);       /*輸出指標的值p=0194*/    getch();    return 0;}

C語言printf（）函數的格式化字串