Access Violation

#include <stdlib.h>
#include <stdio.h>
int reverse_string(char *string){
if(string==NULL)
return -1;
char temp1;
char *temp2=string;
while(*temp2!='\0')
temp2++;
temp2--;
while(string <temp2){
temp1=*string;
*string = *temp2;
*temp2=temp1;
string++;
temp2--;
}
//printf("%s",string);
return 0;
}
int main(){
char *string1="hahalaugh";
reverse_string(string1);
    return 0;
}

ÔÚµ÷ÊÔµ½ºìÉ«×Ö·û±ê×¢µÄµØ·½µÄʱºò·¢Éú´íÎó£ºAcess Violation£¡¸÷λ°ïæ¿´¿´

---

¿´×žÍÏñÊÇÔ½½ç·ÃÎÊÄÚ´æ

---

*string = *temp2;
*temp2=temp1;
ÕâÁ½¾ä¶¼»áÄÇÑù±¨´íµÄ