標(biāo)題: strcat函數(shù)實(shí)現(xiàn)及簡(jiǎn)單應(yīng)用 [打印本頁(yè)]
作者: xiaojuan 時(shí)間: 2014-9-24 22:36
標(biāo)題: strcat函數(shù)實(shí)現(xiàn)及簡(jiǎn)單應(yīng)用
//:Vc++6.0 String strcat函數(shù)
//功能：連接兩個(gè)字符串
//參數(shù)：dest 連接之后的字符串 str 要連接的字符串
//返回值：dest 返回連接之后的字符串
#include<stdio.h>
char * strcat (char *dest, const char *str);
int main(void)
{
chardest[22] = "hello ";
char *str ="world";
char buf[64]= "www ";
strcat(buf,strcat(dest, str));
printf("dest= %s\n", dest);
printf("buf= %s\n", buf);
return0;
}
char * strcat (char *dest, const char *str)
{
if (dest ==NULL || str == NULL)
{
perror("dest or str"); //判斷是否為空
return NULL;
}
char *temp =dest; //創(chuàng)建一個(gè)臨時(shí)的操作地址
while(*temp++ !='\0'); //將dest指向'\0'
temp--;
while (*str!='\0') //拷貝
{
*temp = *str;
str++;
temp++;
}
*temp ='\0'; //加尾0
returndest;
}
//在vc++6.0中的運(yùn)行結(jié)果為： dest = hello world
// buf = www hello world
//注：dest參數(shù)必須之前已經(jīng)分配好了內(nèi)存空間
// 返回值主要用于strcat(buf,strcat(dest, str));//~
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