Comments (1)
To restrict users from selecting previous dates and only allow selection of the current date or future dates in C programming, you can modify your code as follows. Here, I'll provide a console-based example that checks for valid date selection:
#include <stdio.h>
#include <time.h>
#define NUM_DATES 31 // Assuming 31 date cells
int main() {
int selectedDates[NUM_DATES] = {0}; // Initialize an array to track selected dates
int currentDate = 0; // Initialize to no date selected
int selectedDate;
// Get the current date
time_t t;
struct tm *tm_info;
time(&t);
tm_info = localtime(&t);
currentDate = tm_info->tm_mday; // Current day of the month
printf("Today's date is the %dth\n", currentDate);
// Simulate user selecting a date (for example, the 10th)
selectedDate = 10;
// Check if the selected date is valid
if (selectedDate >= currentDate) {
selectedDates[selectedDate] = 1; // Mark the selected date in the array
} else {
printf("Invalid selection. You can only select today's date or a future date.\n");
}
// Display date cells and change colors based on selection
for (int i = 1; i <= NUM_DATES; i++) {
if (selectedDates[i] == 1) {
printf("\x1b[31m"); // Change text color to red (you can customize this)
}
printf("%2d ", i);
if (selectedDates[i] == 1) {
printf("\x1b[0m"); // Reset text color to default
}
}
return 0;
}
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from mncalendarview.