/
progtest8:1.c
139 lines (109 loc) · 3.16 KB
/
progtest8:1.c
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/*
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
int getintfromstring(char * str, int poradi){
int i;
char pom[3];
pom[0] = str[poradi];
pom[1] = str[poradi +1];
pom[2] = '\0';
i = strtol(pom, NULL, 10);
return i;
}
int checkdate(int year, int month, int day){
int year2;
if(year <54)
year2 = year + 1900;
else
year2 = year + 2000;
if (month > 50) month -= 50;
if ((month >12) || (month <1) || (day <1))
return EXIT_FAILURE;
if(day >28){
if(month==2){
if((year%4 != 0) || (day >29))
return EXIT_FAILURE;
}
}
else if(day >31){
switch(month){
case 2:
case 4:
case 6:
case 9:
case 11:
return EXIT_FAILURE;
default:
break;
}
}
return EXIT_SUCCESS;
}
int main()
{
char read;
char cislo[80], mod[10];
char * pom1,* pom2;
long rodc, c;
int i=0, modulo, year, month, day;
printf("Enter an identification number:\n");
while((read=getchar()) != '\n'){
strcpy(&cislo[i], &read);
i++;
}
cislo[i] = '\0';
if(strlen(cislo) != 11){
printf("The string is not an identification number.\n");
return EXIT_FAILURE;
}
for(int j=0; j<10; j++){
if(j ==6){
if(cislo[j] != '/'){
printf("The string is not an identification number.\n");
return EXIT_FAILURE;
}
j++;
}
if(isdigit(cislo[j]) !=1){
printf("The string is not an identification number.\n");
return EXIT_FAILURE;
}
}
pom1 = strtok(cislo, "/");
pom2 = pom1;
pom1 = strtok (NULL, "/");
strcat(pom2, pom1);
pom2[10] = '\0';
strncpy(mod, pom2, 9);
mod[9] = '\0';
rodc = strtol(mod, NULL, 10);
c = strtol(&pom2[9], NULL, 10);
modulo = rodc % 11;
if (modulo == 10) modulo = 0;
if (modulo != c){
printf("The string is not an identification number.\n");
return EXIT_FAILURE;
}
year = getintfromstring(pom2, 0);
month = getintfromstring(pom2, 2);
day = getintfromstring(pom2, 4);
if(checkdate(year,month,day) != EXIT_SUCCESS){
printf("The string is not an identification number.\n");
return EXIT_FAILURE;
}
else printf("The string could be an identification number.\n");
return 0;
}