C examples for Data Type:Date Time
Output day and month text based on tm struct
#include <stdio.h> #include <time.h> int main(void) { const char *day[7] = { "Sunday" , "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" };/*w ww. j av a 2 s.c o m*/ const char *month[12] = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" }; const char *suffix[] = { "st", "nd", "rd", "th" }; enum sufindex { st, nd, rd, th } sufsel = th; // Suffix selector struct tm ourT; // The time structure time_t tVal = time(NULL); // Calendar time if (!localtime(&tVal)) // Populate time structure { fprintf(stderr, "Failed to populate tm struct.\n"); return -1; } switch (ourT.tm_mday) { case 1: case 21: case 31: sufsel = st; break; case 2: case 22: sufsel = nd; break; case 3: case 23: sufsel = rd; break; default: sufsel = th; break; } printf("Today is %s the %d%s %s %d. ", day[ourT.tm_wday], ourT.tm_mday, suffix[sufsel], month[ourT.tm_mon], 1900 + ourT.tm_year); printf("The time is %d : %d : %d.\n", ourT.tm_hour, ourT.tm_min, ourT.tm_sec); return 0; }