#include<stdio.h>
int main(void)
{char name[40];scanf("%s",name);printf("%s\n",name);return 0;
}

#include<stdio.h>
#include<string.h>
#define PRAISE "what a super marvelous name!"
int main(void)
{char name[40];scanf("%s",name);printf("%d %d\n",strlen(name),sizeof name);printf("%d %d\n",strlen(PRAISE),sizeof PRAISE);return 0;
}

#define NAME value

const type name=value

#include<stdio.h>
#define PAGES 931
int main(void)
{printf("*%d*\n",PAGES);    //生成一个与要打印的整数宽度相同的字段printf("*%2d*\n",PAGES);   //指示产生宽度为2的字段，但由于该整数有三位数字，故字段自动扩展以适应数字的长度printf("*%10d*\n",PAGES);  //产生宽度为10即10个空格那么宽的字段，又为正数，则位于整个字段的右端printf("*%-10d*\n",PAGES); //宽度为10，且为负数，位于整个字段的左端return 0;
}

#include<stdio.h>
int main(void)
{const double RENT=3852.99;     //以const方法定义的常量printf("*%f*\n",RENT);         //原数字输出，但是根据类型的有效数字为至少六位printf("*%e*\n",RENT);printf("*%4.2f*\n",RENT);      //小数点左边的数为字段宽度，右边的数为输出数字的有效数字printf("*%3.1f*\n",RENT);printf("*%10.3f*\n",RENT);printf("*%10.3e*\n",RENT);     //字段宽度作用于整个数字，包括小数点；有效位数作用于指数部分printf("*%+4.2f*\n",RENT);     //+标志使得数字与它的代数符号一起打印printf("*%010.2f*\n",RENT);    //0标志产生前导零使得使得结果填充整个字段return 0;
} 

#include<stdio.h>
int main(void)
{printf("**%d**% d**% d**\n",42,42,-42);               //在说明符中使用空格以在正值之前产生一个前导空格，将使有效位相同的正值和负值以相同字段宽度输出printf("**%5d**%5.3d**%05d**%05.3d**\n",6,6,6,6);     //在整数格式中，0标志使用前导零填满整个字段，而使用小数点位则要求有多少个前导零。若同时出现，则0标志被忽略return 0;
}

#include<stdio.h>
#define BLURB "Authentic imitation!"
int main(void)
{printf("/%2s/\n",BLURB);      //扩展宽度printf("/%24s/\n",BLURB);     printf("/%24.5s/\n",BLURB);   //小数点位数表示只打印5个字符（从前往后）printf("/%-24.5s/\n",BLURB);  //-表示左对齐输出return 0;
}

#include<stdio.h>
int main(void)
{int bph2o=211;int rv;rv=printf("%d F is water's boiling point.\n",bph2o);printf("The printf() fuction printfed %d characters.\n",rv); //针对所有的打印字符，包括空格和不可见的空字符return 0;
}

printf("No \
problem!\n");  //下一行必须从最左边开始，不能有空格或缩进

printf("Do you undestand" " me.\n");

#include<stdio.h>
int main(void)
{unsigned width,precision;int number=256;double weight=242.5;printf("What field width?\n");scanf("%d",&width);printf("The number is:%*d:\n",width,number);printf("Now enter a width and a precision:\n");scanf("%d %d",&width,&precision);printf("Weight = %*.*f\n",width,precision,weight);return 0;
}

int n;printf("Please enter three integers:\n");scanf("%*d %*d %d",&n);printf("The last integer was %d\n",n);