《带你学C带你飞》学习笔记_S1E11
动动手0、
#include<stdio.h>
#define STRING char *
#define IF if(
#define THEN ){
#define ELSE }else{
#define FI ;}
#define WHILE while(
#define DO ){
#define OD ;{
#define BEGIN {
#define END }
#define INT int
INTmain()
BEGIN
INT i;
printf("请输入您的年龄：");
scanf("%d",&i);
IF i < 18
THEN
printf("您未满18周岁，不得使用这个程序！\n");
ELSE
printf("您已满18周岁，欢迎使用本程序，嘿嘿嘿。。。\n")
FI
return 0;
END
1、
2、#include<stdio.h>
int main()
{
char i;
printf("请输入一个字母：");
scanf("%c",&i);
if(i >= 'a' && i <='z' )
{
i = i - 32;
printf("此字母的大写形式为:%c\n",i);
}
else if (i >= 'A' && i <= 'Z')
{
i = i + 32;
printf("此字母的小写形式为:%c\n",i);
}
else
{
printf("您输入有误。\n");
}
return 0;
}
3、#include<stdio.h>
#include "ssebtr1.h"
int main()
{
int age, LimitRate, BPM, hr;
printf("请输入您的年龄：");
scanf("%d",&age);
LimitRate = 220 - age;
BPM = 150;
playSound(BPM);
hr = getHeartRate();
if(hr > LimitRate)
{
printf("请马上停止跑步，否则会有生命危险！\n");
}
else if(hr > 0.85*LimitRate)
{
printf("请放慢脚步\n");
BPM = BPM - 20;
playSound(BPM);
}
else if(hr < 0.75*LimitRate)
{
printf("Come on, 请加快节奏！\n");
BPM = BPM + 20;
playSound(BPM);
}
else
{
playSound(BPM);
}
return 0;
}
用“代码块”包裹代码，视觉效果更好哦～
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