在命令行里显示时间
链接
内容
起源
easy time show on ubuntu
显示效果
行动
设想是美好的，行动是复杂的。
获取系统时间
为了更好的实时同步系统时间并显示，采用了一个懒办法 使用popen来获取系统时间
stream = popen("date","r");
fread(buf,sizeof(char),sizeof(buf),stream);
char *tmp;
int i = 0;
tmp = strtok(buf," ");
while(tmp!=NULL&&i<4){
tmp = strtok(NULL," ");
if(i==3){
i = 4;
}
i++;
}
获取之后如何显示呢?
制定点阵：
char a0[8][6] = {" *** ",
"* *",
"* *",
"* *",
"* *",
"* *",
"* *",
" *** "};
char a1[8][6] = {" * ",
" ** ",
" * ",
" * ",
" * ",
" * ",
" * ",
"*****"};
char a2[8][6] = {" *** ",
"* *",
"* *",
" * ",
" * ",
" * ",
"* *",
"*****"};
char a3[8][6] = {" *** ",
"* *",
" *",
" ** ",
" *",
" *",
"* *",
" *** "};
char a4[8][6] = {" * ",
" ** ",
" * * ",
"* * ",
"* * ",
" ****",
" * ",
" ***"};
char a5[8][6] = {"*****",
"* ",
"* ",
"**** ",
" *",
" *",
"* *",
" *** "};
char a6[8][6] = {" *** ",
"* *",
"* ",
"**** ",
"* *",
"* *",
"* *",
" *** "};
char a7[8][6] = {"*****",
"* *",
" * ",
" * ",
" * ",
" * ",
" * ",
" * "};
char a8[8][6] = {" *** ",
"* *",
"* *",
" *** ",
"* *",
"* *",
"* *",
" *** "};
char a9[8][6] = {" *** ",
"* *",
"* *",
"* *",
" ****",
" *",
"* *",
" *** "};
char ax[8][6] = {" ",
" ** ",
" ** ",
" ",
" ",
" ** ",
" ** ",
" "};
匹配时间字符
例如输入时间是16:35:21 则开始匹配： 将匹配到的数字每行相加，输出到新的数组中。
char time[8][200];
for(int i=0;i<8;i++)
for(int j=0;j<200;j++)
time[i][j]='\0';
while((temp=date[i])!=NULL){
if(temp =='1')
strcpy_1(time_temp,a1);
if(temp =='2')
strcpy_1(time_temp,a2);
if(temp =='3')
strcpy_1(time_temp,a3);
if(temp =='4')
strcpy_1(time_temp,a4);
if(temp =='5')
strcpy_1(time_temp,a5);
if(temp =='6')
strcpy_1(time_temp,a6);
if(temp =='7')
strcpy_1(time_temp,a7);
if(temp =='8')
strcpy_1(time_temp,a8);
if(temp =='9')
strcpy_1(time_temp,a9);
if(temp =='0')
strcpy_1(time_temp,a0);
if(temp ==':')
strcpy_1(time_temp,ax);
//将匹配到的字符的每行相加
for(int j=0;j<8;j++){
int m = i*8;
int n = (i+1)*8;
time[j][m] = xspace[j][0];
m++;
time[j][m] = xspace[j][1];
m++;
for(int x=0;m<n;m++){
time[j][m]=time_temp[j][x];
x++;
}
}
i++;
}
获得时间结果，并输出
最开始是1s的间隔，效果令人不能忍受，而且由于延时函数的不准确导致秒会跳动。 后来usleep(100000)函数，100000ns = 0.01s解决了问题 并增加了彩色显示效果：
for(int i=0;i<8;i++)
{
for(int j=0;j<200;j++)
{
if(time[i][j]!='\0')
{
int x = rand()%7;
if(x==0)
printf("\033[1;32m%c",time[i][j]);
if(x==1)
printf("\033[1;33m%c",time[i][j]);
if(x==2)
printf("\033[1;34m%c",time[i][j]);
if(x==3)
printf("\033[1;35m%c",time[i][j]);
if(x==4)
printf("\033[1;36m%c",time[i][j]);
if(x==5)
printf("\033[1;37m%c",time[i][j]);
if(x==6)
printf("\033[1;38m%c",time[i][j]);
}
}
printf("\n");
}
###源码
#include<sys/types.h>
#include<unistd.h>
#include<stdlib.h>
#include<string.h>
#include<stdio.h>
void strcpy_1(char a[8][6],char b[8][6]){
for(int i =0;i<8;i++)
for(int j=0;j<6;j++)
a[i][j] = b[i][j];
}
void print_number(char *date){
char a0[8][6] = {" *** ",
"* *",
"* *",
"* *",
"* *",
"* *",
"* *",
" *** "};
char a1[8][6] = {" * ",
" ** ",
" * ",
" * ",
" * ",
" * ",
" * ",
"*****"};
char a2[8][6] = {" *** ",
"* *",
"* *",
" * ",
" * ",
" * ",
"* *",
"*****"};
char a3[8][6] = {" *** ",
"* *",
" *",
" ** ",
" *",
" *",
"* *",
" *** "};
char a4[8][6] = {" * ",
" ** ",
" * * ",
"* * ",
"* * ",
" ****",
" * ",
" ***"};
char a5[8][6] = {"*****",
"* ",
"* ",
"**** ",
" *",
" *",
"* *",
" *** "};
char a6[8][6] = {" *** ",
"* *",
"* ",
"**** ",
"* *",
"* *",
"* *",
" *** "};
char a7[8][6] = {"*****",
"* *",
" * ",
" * ",
" * ",
" * ",
" * ",
" * "};
char a8[8][6] = {" *** ",
"* *",
"* *",
" *** ",
"* *",
"* *",
"* *",
" *** "};
char a9[8][6] = {" *** ",
"* *",
"* *",
"* *",
" ****",
" *",
"* *",
" *** "};
char ax[8][6] = {" ",
" ** ",
" ** ",
" ",
" ",
" ** ",
" ** ",
" "};
char xspace[8][3]={" "," "," "," "," "," "," "," "};
char temp;
char time_temp[8][6];
int i = 0;
char time[8][200];
for(int i=0;i<8;i++)
for(int j=0;j<200;j++)
time[i][j]='\0';
while((temp=date[i])!=NULL){
if(temp =='1')
strcpy_1(time_temp,a1);
if(temp =='2')
strcpy_1(time_temp,a2);
if(temp =='3')
strcpy_1(time_temp,a3);
if(temp =='4')
strcpy_1(time_temp,a4);
if(temp =='5')
strcpy_1(time_temp,a5);
if(temp =='6')
strcpy_1(time_temp,a6);
if(temp =='7')
strcpy_1(time_temp,a7);
if(temp =='8')
strcpy_1(time_temp,a8);
if(temp =='9')
strcpy_1(time_temp,a9);
if(temp =='0')
strcpy_1(time_temp,a0);
if(temp ==':')
strcpy_1(time_temp,ax);
for(int j=0;j<8;j++){
int m = i*8;
int n = (i+1)*8;
time[j][m] = xspace[j][0];
m++;
time[j][m] = xspace[j][1];
m++;
for(int x=0;m<n;m++){
time[j][m]=time_temp[j][x];
x++;
}
// if(i==0)
// for(int x=0;x<n;x++)
// printf("%c",time[j][x]);
//time_x = strcat(time[j],xspace[j]);
//time[j] = strcat(time_x[j],time_temp);
}
i++;
}
for(int i=0;i<8;i++)
{
for(int j=0;j<200;j++)
{
if(time[i][j]!='\0')
{
int x = rand()%7;
if(x==0)
printf("\033[1;32m%c",time[i][j]);
if(x==1)
printf("\033[1;33m%c",time[i][j]);
if(x==2)
printf("\033[1;34m%c",time[i][j]);
if(x==3)
printf("\033[1;35m%c",time[i][j]);
if(x==4)
printf("\033[1;36m%c",time[i][j]);
if(x==5)
printf("\033[1;37m%c",time[i][j]);
if(x==6)
printf("\033[1;38m%c",time[i][j]);
}
}
printf("\n");
}
}
int main(){
while(1)
{
printf("\033[1;32m***** ** *** *** ***** \n");
printf("\033[31m * * * * * * **\n");
printf("\033[1;34m * ** * * * ***** \n");
printf("\033[1;33m * ** * * * * ** \n");
printf("\033[1;37m * ** * * * ***** \n\n\n");
printf("\033\[1;32m\n");
FILE *stream;
char buf[50];
stream = popen("date","r");
fread(buf,sizeof(char),sizeof(buf),stream);
char *tmp;
int i = 0;
tmp = strtok(buf," ");
while(tmp!=NULL&&i<4){
tmp = strtok(NULL," ");
if(i==3){
i = 4;
}
i++;
}
pclose(stream);
print_number(tmp);
//system("sleep 1");
usleep(100000);
system("clear");
}
return 0;
}