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#include <stdio.h>
#include <stdlib.h>
#define Rozmiar 5
int main(){
    int i=0;
    int tmp,j;
    // przyklad nr 1
    printf("przyklad nr 1\n");
    for (i=0;i<Rozmiar;i++);
        printf("zmienna i to %d\n", i);
        printf("GOAL\n");
    system("pause");    
 
    // przyklad nr 2
    // 4294967297   
    printf("przyklad nr 2\n"); 
    for (j=0;j<i;j--){
        j=j-1000000000;
        printf("podaj liczbe calkowita:");
        scanf_s("%d", &tmp);
        printf("\nPodana liczba to %d\n", tmp);
        }       
    /* do indywidualnego przeanalizowania
    for(i=0;i>3;i--);
        printf("czy to zadziala i dlaczego?"); */
    system("pause");   
    return 0; 
}

prog.c: In function ‘main’:
prog.c:9:5: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation]
     for (i=0;i<Rozmiar;i++);
     ^~~
prog.c:10:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘for’
         printf("zmienna i to %d\n", i);
         ^~~~~~
prog.c:20:9: warning: implicit declaration of function ‘scanf_s’; did you mean ‘scanf’? [-Wimplicit-function-declaration]
         scanf_s("%d", &tmp);
         ^~~~~~~
         scanf
prog.c:12:5: warning: ignoring return value of ‘system’, declared with attribute warn_unused_result [-Wunused-result]
     system("pause");
     ^~~~~~~~~~~~~~~
prog.c:26:5: warning: ignoring return value of ‘system’, declared with attribute warn_unused_result [-Wunused-result]
     system("pause");
     ^~~~~~~~~~~~~~~
/usr/bin/ld: /home/flKldY/ccOD9nDt.o: in function `main':
prog.c:(.text.startup+0x9c): undefined reference to `scanf_s'
collect2: error: ld returned 1 exit status

Standard output is empty