C 语言初学这，请教字符串排序问题

代码

#include <string.h>
#include <stdio.h>
#include <stdlib.h>

int myCompare (const void * a, const void * b ) {
    const char *pa = *(const char**)a;
    const char *pb = *(const char**)b;

    return strcmp(pa,pb);
}

int main() {
    int i;
    // const char *input[] = {"a","orange","apple","mobile","car"};
    const char *input[1024];
    input[0]="a";
    input[1] = "orange";
    input[2] = "apple";
    input[3] = "apple";
    input[4] = "mobile";
    input[5] = "car";
    int stringLen = sizeof(input) / sizeof(char *);
    qsort(input, stringLen, sizeof(char *), myCompare);

    for (i=0; i<stringLen; ++i)
        printf("%d: %s\n", i, input[i]);
}

这段代码为什么会报 coredump
但是如果把input变成const char *input[] = {"a","orange","apple","mobile","car"};,那么就不会报错，求指点！！