#include <stdio.h>
#include <string.h>
#include <stdlib.h>
struct str
{
    char s[20];
}st[200];
int cmp(const void *a, const void *b)
{
    return strcmp((*(str *)a).s,(*(str *)b).s);
}
int main()
{
    int n,i;
    while(scanf("%d",&n)!=EOF)
    {
        for(i=0;i<n;i++)
        {
            scanf("%s",st[i].s);
        }
        qsort(st,n,sizeof(st[0].s),cmp);
        for(i=0;i<n;i++)
        {
            printf("%s\n",st[i].s);
        }
    }
    return 0;
}

||warning: command line option "-Weffc++" is valid for C++/ObjC++ but not for C|
\c\main.c||In function 'cmp':|
\c\main.c|10|error: 'str' undeclared (first use in this function)|
\c\main.c|10|error: (Each undeclared identifier is reported only once|
\c\main.c|10|error: for each function it appears in.)|
\c\main.c|10|error: expected expression before ')' token|
\c\main.c|10|error: expected expression before ')' token|
||=== Build finished: 5 errors, 1 warnings ===|