基于Linux的日历程序显示

#include<stdio.h> #include<stdlib.h> #include<string.h> #include"yl_show_font.h" #define TRUE 1 #define FALSE 0 int days_in_month[]={0,31,28,31,30,31,30,31,31,30,31,30,31}; char *months[]= { " ", "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" }; int inputyear(void) { int year; printf("Please enter a year (example: 2019) : "); scanf("%d", &year); return year; } int inputmonth(void) { int month; printf("Please enter a month (example: 1) : "); scanf("%d", &month); return month; } int determinedaycode(int year) { int daycode; int d1, d2, d3; d1 = (year - 1.)/ 4.; d2 = (year - 1.)/ 100.; d3 = (year - 1.)/ 400.; daycode = (year + d1 - d2 + d3) %7; return daycode; } int determineleapyear(int year) { if(year% 4 == FALSE && year%100 != FALSE || year%400 == FALSE) { days_in_month[2] = 29; return TRUE; } else { days_in_month[2] = 28; return FALSE; } } void calendar(int year, int month, int daycode) { int day,i, k; char row_rest[29] ; char string[10]; int x, y; int cmp; lcd_clear_screen(BLACK); memset(row_rest, '\0',sizeof(row_rest)); memset(string, '\0',sizeof(string)); x = 100; y = 100; lcd_show_string(x, y, months[month]); //显示第一行 y += 20; lcd_show_string(x, y, "Sun Mon Tue Wed Thu Fri Sat");//显示第二行 y += 20; // Correct the position of the first day of month for( cmp=1; cmp<=month-1; cmp++) { daycode = (daycode + days_in_month[cmp]) % 7; } // Correct the position for the first date for ( day = 1; day <= 1 + daycode * 5; day++ ) { strcat(row_rest, " "); } // Print all the dates for one month for ( day = 1; day <= days_in_month[month]; day++ ) { snprintf(string, 10,"%2d",day); strcat(row_rest,string); // Is day before Sat? Else start next line Sun. if ( ( day + daycode ) % 7 > 0 ) { strcat(row_rest, " "); } else { lcd_show_string(x, y, row_rest); memset(row_rest, '\0',sizeof(row_rest)); y += 20; } } lcd_show_string(x, y, row_rest); } int main(int argc, char *argv[]) { int year, month, daycode, leapyear; //日历 int ret; int daycode_init; year = inputyear(); daycode = determinedaycode(year); daycode_init = daycode; while(1) { month = inputmonth(); if((month>=1)&&(month<=12)) { determineleapyear(year); fd_fb = open("/dev/fb0", O_RDWR); if(fd_fb == -1) { printf("can't open /dev/fb0!\n"); return -1; } ret = ioctl(fd_fb, FBIOGET_VSCREENINFO, &var); if(ret == -1) { printf("can't ioctl for /dev/fb0!\n"); return -1; } ret = ioctl(fd_fb, FBIOGET_FSCREENINFO, &fix); if(ret == -1) { printf("can't ioctl for /dev/fb0!\n"); return -1; } screen_size = var.xres * var.yres * var.bits_per_pixel / 8; line_width = var.xres * var.bits_per_pixel / 8; pixel_width = var.bits_per_pixel / 8; fbmem = mmap(NULL, screen_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd_fb, 0); if(fbmem == (char *)-1) { printf("mmap for /dev/fb0 error!\n"); return -1; } fd_hzk16 = open("HZK16", O_RDONLY); if(fd_hzk16 == -1) { printf("can't open HZK16!\n"); return -1; } ret = fstat(fd_hzk16, &hzk16_stat); if(ret == -1) { printf("fstat for HZK16 is error!\n"); return -1; } hzk16mem = mmap(NULL, hzk16_stat.st_size, PROT_READ, MAP_SHARED, fd_hzk16, 0); if(hzk16mem == (char *)-1) { printf("mmap for HZK16 error!\n"); return -1; } lcd_clear_screen(BLACK); daycode = daycode_init; calendar(year, month, daycode); munmap(fbmem, screen_size); munmap(hzk16mem, hzk16_stat.st_size); } else{break;} } close(fd_fb); close(fd_hzk16); return 0; }