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题目:学习static定义静态变量的用法
1.程序分析:
2.程序源代码:
#include "stdio.h"
varfunc()
{
int var=0;
static int static_var=0;
printf("40:var equal %d ",var);
printf("40:static var equal %d ",static_var);
printf("");
var++;
static_var++;
}
void main()
{
int i;
for(i=0;i3;i++)
varfunc();
}
题目:学习使用auto定义变量的用法
1.程序分析:
2.程序源代码:
#include "stdio.h"
main()
{
int i,num;
num=2;
for (i=0;i3;i++)
{
printf("40: The num equal %d ",num);
num++;
{
auto int num=1;
printf("40: The internal block num equal %d ",num);
num++;
}
}
}
题目:学习使用static的另一用法。
1.程序分析:
2.程序源代码:
#include "stdio.h"
main()
{
int i,num;
num=2;
for(i=0;i3;i++)
{
printf("40: The num equal %d ",num);
num++;
{
static int num=1;
printf("40:The internal block num equal %d",num);
num++;
}
}
}
更多内容请看C/C++进阶技术文档专题,或
题目:学习使用external的用法。
1.程序分析:
2.程序源代码:
#include "stdio.h"
int a,b,c;
void add()
{
int a;
a=3;
c=a+b;
}
void main()
{
a=b=4;
add();
printf("The value of c is equal to %d",c);
}
题目:学习使用register定义变量的方法。
1.程序分析:
2.程序源代码:
void main()
{
register int i;
int tmp=0;
for(i=1;i=100;i++)
tmp+=i;
printf("The sum is %d",tmp);
}
题目:宏#define命令练习(1)
1.程序分析:
2.程序源代码:
#include "stdio.h"
#define TRUE 1
#define FALSE 0
#define SQ(x) (x)*(x)
void main()
{
int num;
int again=1;
printf("40: Program will stop if input value less than 50.");
while(again)
{
printf("40:Please input number==");
scanf("%d",&num);
printf("40:The square for this number is %d ",SQ(num));
if(num=50)
again=TRUE;
else
again=FALSE;
}
}
更多内容请看C/C++进阶技术文档专题,或
题目:宏#define命令练习(2)
1.程序分析:
2.程序源代码:
#include "stdio.h"
#define exchange(a,b)
{
/*宏定义中答应包含两道衣裳命令的情形,此时必须在最右边加上""*/
int t;
t=a;
a=b;
b=t;
}
void main(void)
{
int x=10;
int y=20;
printf("x=%d; y=%d",x,y);
exchange(x,y);
printf("x=%d; y=%d",x,y);
}
题目:宏#define命令练习(3)
1.程序分析:
2.程序源代码:
#define LAG
#define SMA
#define EQ ==
#include "stdio.h"
void main()
{
int i=10;
int j=20;
if(i LAG j)
printf("40: %d larger than %d ",i,j);
else if(i EQ j)
printf("40: %d equal to %d ",i,j);
else if(i SMA j)
printf("40:%d smaller than %d ",i,j);
else
printf("40: No sUCh value.");
}
题目:#if #ifdef和#ifndef的综合应用。
1. 程序分析:
2.程序源代码:
#include "stdio.h"
#define MAX
#define MAXIMUM(x,y) (xy)?x:y
#define MINIMUM(x,y) (xy)?y:x
void main()
{
int a=10,b=20;
#ifdef MAX
printf("40: The larger one is %d",MAXIMUM(a,b));
#else
printf("40: The lower one is %d",MINIMUM(a,b));
#endif
#ifndef MIN
printf("40: The lower one is %d",MINIMUM(a,b));
#else
printf("40: The larger one is %d",MAXIMUM(a,b));
#endif
#undef MAX
#ifdef MAX
printf("40: The larger one is %d",MAXIMUM(a,b));
#else
printf("40: The lower one is %d",MINIMUM(a,b));
#endif
#define MIN
#ifndef MIN
printf("40: The lower one is %d",MINIMUM(a,b));
#else
printf("40: The larger one is %d",MAXIMUM(a,b));
#endif
}
题目:#include 的应用练习
1.程序分析:
2.程序源代码:
test.h 文件如下:
#define LAG
#define SMA
#define EQ ==
#include "test.h" /*一个新文件50.c,包含test.h*/
#include "stdio.h"
void main()
{
int i=10;
int j=20;
if(i LAG j)
printf("40: %d larger than %d ",i,j);
else if(i EQ j)
printf("40: %d equal to %d ",i,j);
else if(i SMA j)
printf("40:%d smaller than %d ",i,j);
else
printf("40: No such value.");
}
更多内容请看C/C++进阶技术文档专题,或