c语言库函数【string.h】之 substr_(char *dest, const char* src, unsigned int start, unsigned int len)

 

 

c语言库函数【string.h】之 substr_(char *dest, const char* src, unsigned int start, unsigned int len)

 

代码如下：

#include<assert.h>

#include<stdio.h>

 

//substr截取子串

char * substr_(char *dest, const char* src, unsigned int start, unsigned int len){

strncpy_(dest,src+start,len);//或者调用系统strncpy函数

dest[len] ='/0';

return dest;

 

}