C ++程序将时间从12小时转换为24小时格式
这是一个C++程序，用于将时间从12小时转换为24小时格式。
算法
Begin
In main(),
If median = pm
Check if entered hours is less than 12
Then add 12 to hours and print the time in 24 hours format.
Check if entered hours is equal to 12
Then print “00” as hours and print the time in 24 hours format.
Else If median=am
Check if entered hours is less than 12
Then print the time in 24 hours format.
Check if entered hours is equal to 12
Then print “12” as hours and print the time in 24 hours format.
Else print wrong choice.
End示例
#include<iostream>
#include<string.h>
#include <iomanip>
using namespace std;
int main() {
int hours,minutes,seconds,h1,m1,s1;
char median[10];
cout<<"Enter hours, minutes, seconds:";
cin>>hours;
cin>>minutes;
cin>>seconds;
cout<<"输入中位数：";
cin>>median;
cout<<"时间以12小时格式："<<setfill('0') << setw(2) <<hours<<":"<<setfill('0') << setw(2)
<<minutes<<":"<<setfill('0') << setw(2) <<seconds<<median<<endl; //setw()=sets the field width,
//setfill()=将字符设置为流填充字符。
if(strcmp(median,"pm")==0) { //compare the strings "0" is for true "1" is for false.
if (hours<12) {
h1=hours+12;
m1=minutes;
s1=seconds;
cout<<"24小时制的时间：" <<h1<<":"<<setfill('0') << setw(2) <<m1<<":"<<setfill('0') << setw(2) <<s1<<median;
} else if(hours=12) {
h1=12;
m1=minutes;
s1=seconds;
cout<<"24小时制的时间："<<h1<<":"<<setfill('0') << setw(2) <<m1<<":"<<setfill('0') << setw(2) <<s1<<median;
}
} else if(strcmp(median,"am")==0) {
if (hours<12) {
h1=hours;
m1=minutes;
s1=seconds;
cout<<"24小时制的时间："<<setfill('0') << setw(2) <<h1<<":"<<setfill('0') << setw(2) <<m1<<":"<<setfill('0') << setw(2) <<s1<<median;
} else if(hours=12) {
m1=minutes;
s1=seconds;
cout<<"24小时制的时间："<<"00"<<":"<<setfill('0') << setw(2) <<m1<<":"<<setfill('0') << setw(2) <<s1<<median;
}
} else {
printf("Wrong choice");
}
}输出结果
Enter hours, minutes, seconds:12 07 06 输入中位数：pm 时间以12小时格式：12:07:06pm 24小时制的时间：12:07:06pm Enter hours, minutes, seconds:01 02 30 输入中位数：pm 时间以12小时格式：01:02:30pm 24小时制的时间：13:2:30pm Enter hours, minutes, seconds:10 10 03 输入中位数：am 时间以12小时格式：10:10:03am 24小时制的时间：10:10:03am Enter hours, minutes, seconds:12 02 04 输入中位数：am 时间以12小时格式：12:02:04am 24小时制的时间：00:02:04am
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