51 lines
789 B
C
51 lines
789 B
C
#include <stdio.h>
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#include <stdlib.h>
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#define __USE_XOPEN
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#include <time.h>
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int main(int argc, char const *argv[]){
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char str[50];
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fgets(str, 50, stdin);
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struct tm time;
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if(strptime(str, "%d.%m.%Y", &time)==NULL){
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printf("Nespravny datum\n");
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return 0;
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}
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int max;
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switch(time.tm_mon+1){
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case 2:
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if((time.tm_year+1900)%4==0)
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max=29;
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else
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max=28;
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break;
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case 4:
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case 6:
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case 9:
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case 11:
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max=30;
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break;
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default:
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max=31;
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}
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if(time.tm_mday<1){
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printf("Nespravny datum\n");
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return 0;
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}
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if(time.tm_mday>max){
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printf("Nespravny datum\n");
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return 0;
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}
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time_t pouprave = mktime(&time)+604800+3600;
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strftime(str, sizeof(str), "%d.%m.%Y", localtime(&pouprave));
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if(str[0]=='0'){
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str[0]=' ';
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}
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printf("%s\n\n", str);
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return 0;
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}
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