96 lines
1.7 KiB
C
96 lines
1.7 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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enum Day {
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MONDAY,
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TUESDAY,
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WEDNESDAY,
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THURSDAY,
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FRIDAY,
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SATURDAY,
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SUNDAY
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};
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int DayTill(enum Day Current, enum Day Other)
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{
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return 0;
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}
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// Unfortunatly there is no easy way to print out enums as text,
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// because internaly they are just numbers.
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char *EnumToString(char *Dest, enum Day WeekDay)
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{
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// When we get to memory allocation you could do this without the destination buffer
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switch(WeekDay)
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{
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case MONDAY:
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{
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strcpy(Dest,"monday");
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}break;
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case TUESDAY:
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{
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strcpy(Dest,"tuesday");
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}break;
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case WEDNESDAY:
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{
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strcpy(Dest,"wednesday");
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}break;
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case THURSDAY:
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{
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strcpy(Dest,"thursday");
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}break;
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case FRIDAY:
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{
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strcpy(Dest,"friday");
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}break;
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case SATURDAY:
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{
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strcpy(Dest,"saturday");
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}break;
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case SUNDAY:
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{
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strcpy(Dest,"sunday");
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}break;
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}
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return Dest;
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}
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int main(int argc, const char *argv[])
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{
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// We can now assign variables one of our enums options.
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enum Day current_day = MONDAY;
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// To shorten the syntax we can also do a typedefinition:
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typedef enum Day DayType;
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// Now we just need to write:
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DayType x = TUESDAY;
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// Each of the enums options has an associated value so we can do:
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if (x > current_day) {
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printf("Tuesday is larger %d.\n", x);
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}
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char Buffer[32],Buffer2[32];
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printf("Today is %s. %d days until next %s", EnumToString(Buffer, atoi(argv[1])), DayTill(atoi(argv[1]), atoi(argv[2])), EnumToString(Buffer2, atoi(argv[2])));
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}
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// If you want the values to be different, you can set them explicitly
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enum Months {
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JANUARY = 10,
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FEBRUARY = 0,
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MARCH = 33,
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APRIL = 99,
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MAY = 6,
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JUNE = 42,
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JULY = 27,
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AUGUST = 3,
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SEPTEMBER = 1,
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OCTOBER = 4,
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NOVEMBER,
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DECEMBER = 5,
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};
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