#include <stdio.h>
int len = 0;
char str1(char string){
char *p = &string;
while(1){
if(*p == '\n'){
break;
} else {
*p++;
len++;
}
}
return len;
}
int main (void){
char string = "Trung Dep Trai...";
len = str1(string);
printf("Do dai cua chuoi la: %d\n",len);
}