字符串链接比较源代码

#include <stdio.h>

int my_strlen(char *p) //计算字符串的长度
{
int len = 0;

while(*p != '\0')
{
	len++;	
	p++;
}

return len;

}

int my_strcmp(char *ptr1,char *ptr2) //比较两个字符串是否相等
{
if(my_strlen(ptr1) != my_strlen(ptr2) )
{
printf(“两个字符串长度不等!\n”);

	return -1;
}

while( *ptr1 != '\0' )
{
	if( *ptr1 != *ptr2 )
	{
		return -1;
	}
	ptr1++;
	ptr2++;
}

return 1;

}

void my_strcat(char *str1,char *str2) //连接两个字符串
{

while(*str1 != '\0')
{
	str1++;
}                                                 //将str1遍历到最后，记录地址
while(*str2 != '\0')
{
	*str1 = *str2;
	str1++;
	str2++;
}
*str1 = '\0';

}

int main()
{
char src1[100];
char src2[100];
int flag = 0; //用flag记录返回值

printf("please input src1:\n");
scanf("%s",src1);
//fgets(src1,100,stdin);
printf("please input src2:\n");
scanf("%s",src2);
//fgets(src2,100,stdin);

flag = my_strcmp(src1,src2);
if(flag == 1)
{
	printf("YES!\n");
}
else
{
	printf("NO!\n");
}

my_strcat(src1,src2);                         //输出连接后的字符
printf("the result is:%s\n",src1);

return 0;

}

标签：++,str1,char,src1,printf,字符串,源代码,my,链接
来源： https://blog.csdn.net/qq_51450595/article/details/116561498