REVIEW

ans

它们被称为函数

2.什么是语法错误？给出一个英语例子和一个C语言例子

me

C的语法错误是指把正确的C符号放在了错误的位置

likes coding He. 

int main(void)

()

ans

语法错误就是指违背了如何把语句或程序放置在一起的规则。

Me speaks English good.

printf "where are the parentheses?";

3.什么是语义错误？给出一个英语例子和一个C语言例子

4.评定下面的程序

#include <</font>studio.h>

int main(void)
 

({

int s;

s: = 56;s=
56;

printf ("There are
s%d
weeks in a year.",s);

return 0;

)}

PRACTICE

1.利用printf函数输出姓名

#include

int main(void)

{

printf("Tom Smith\n");

printf("Tom\nSmith\n");

printf("Tom ");

printf("Smith\n");

 

return 0;

}

 

2.输出您的姓名和地址

#include

int main(void)

{

 printf("Name: Tom Smith\n");

 printf("Add: China AnHui MaAnShan\n");

 return 0;

}

 

3.把年龄转换成天数并显示二者的值

#include

int main(void)

{

 int age;

 int day;

 age = 24;

 printf("tom is %d years old\n",age);

 printf("tom has been on earth for %d
days\n",age*365);

 return 0;

}

 

4.

#include

void prnt1(void);

void prnt2(void);

int
main(void)   //主函数定义用
int main(void)

{

 prnt1();

 prnt1();

 prnt1();

 prnt2();

 return 0;

}

void prnt1(void)  //子函数定义用 void
func(void)

{

 printf("For Tom is a jolly good
fellow!\n");

}

void prnt2(void)

{

 printf("Which nobody can deny!!!\n");

}

 

5.

#include

int main(void)

{

 int toes,t_sqr,t_sum;

 toes = 10;

 t_sqr = toes * toes;

 t_sum = toes + toes;

 printf("toes = %d\ntoes and = %d\ntoes square =
%d\n",toes,t_sum,t_sqr);

 

 return 0;

}

 

6.

#include

void prt_s(void);

void prt_n(void);

int main(void)

{

 prt_s();

 prt_s();

 prt_s();

 prt_n();

 prt_s();

 prt_s();

 prt_n();

 prt_s();

 prt_n();

 return 0;

}

void prt_s(void)

{

 printf("Smile!");

}

void prt_n(void)

{

 printf("\n");

}

 

7.

#include

void one_three(void);

void two(void);

int main(void)

{

 printf("starting now:\n");

 one_three();

 printf("done!\n");

 return 0;

}

void one_three()

{

 printf("one\n");

 two();

 printf("three\n");

}

void two()

{

 printf("two\n");

}