Thread: What's wrong?

Hi, what's wrong with this code? I just followed the requirements of using strcat.

Code:

#include<stdio.h>
#include<string.h>
int main()
{
    char arr2[]="I love mom";
    char arr3[]="45";
    strcat(arr2,arr3);
    printf("%s", arr2);
    return 0;
}