[C语言]非递归实现strlen
#include<stdio.h>
#include<stdlib.h>
#include<assert.h>
int strlen_(char *arr){
assert(*arr != 0);//前置条件断言：代码执行之前必须具备的特性
int num = 0;
while (*arr){
num++;
arr++;
}
return num;
}
int main(){
char *a = "abcdef";
int ret = strlen_(a);
printf("%d\n", ret);
system("pause");
return 0;
}