pvjc20/du3/program.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main()
{ 
char *str;
str = (char*) malloc(12);
scanf("%s",str);
int day=0;
int m=0;
int y=0;
int z=0; 
sscanf(str, "%d.%d.%d", &day, &m, &y);
if(y%400==0 ||(y%100!=0 && y%4==0)){
    z++;
}
if(m==2){
    if(z==1 &&day>29){
    printf("Nespravny datum\n");
    return 0;
    }
    if(z==0 &&day>28){
    printf("Nespravny datum\n");
    return 0;    
    }    
}
if(m>12 || y<0 || m<=0 || day<=0){
    printf("Nespravny datum\n");
    return 0;  
}
day+=7;
if(m%2!=0 && day>31){
    day-=31;
    m++;
}
if(m%2==0 && day>30){
    if(m==2 &&(y%400==0 ||(y%100!=0 && y%4==0))){
        day-=29;
    }
    else if(m==2){
        day-=28;
    }
    else{
        day-=30;
    }
    m++;
}
if(m>12){
    m-=12;
    day--;
    y++;
}
if(m>9 && day>9){
    printf("%d.%d.%d\n",day,m,y);
}
else if(m<10 && day>9){
    printf("%d.0%d.%d\n",day,m,y); 
}
else if(m>9 && day<10){
    printf(" %d.%d.%d\n",day,m,y);
}
else{
    printf(" %d.0%d.%d\n",day,m,y);
}
printf("\n");

  return 0;
}