iso2eng.c

#define _GNU_SOURCE
#include <stdlib.h>
#include <stdio.h>

const char month_name[12][10] = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" };
size_t BUFSIZE = 10;

char* iso2eng(char* iso_str) {
    char* result;
    int num[3];
    sscanf(iso_str, "%d-%d-%d", &num[0], &num[1], &num[2]);
    asprintf(&result, "%s %d %d", month_name[num[1] - 1], num[2], num[0]);
    return result;
}

int main(int argc, char** argv) {
    char* buf;
    if (argc > 1) {
        buf = argv[1];
    } else {
        buf = (char*) malloc(BUFSIZE * sizeof(char));
        getline(&buf, &BUFSIZE, stdin);
    }
    puts(iso2eng(buf));
}