c语言输入一个字符串，输入整数m，从m处交换前后两段的位置，使用指针

淡淡的烟草味﹌ 2023-07-04 08:41 7阅读 0赞

#include<stdio.h>
    #include<string.h>
    
    void connect(char *st1, char *st2, char *q)
    { 
    	for(;*st1!='\0';)
    	{ 
    		*q=*st1;
    		st1++;
    		q++;
    	}	
    	for(;*st2!='\0';)
    	{ 
    		*q=*st2;
    		st2++;
    		q++;
    	}
    	*q='\0';
    }
    
    int main()
    { 
    	char soul[20];
    	printf("请输入字符串: \n");
    	gets(soul);
    	int len,m;
    	printf("请输入想要交换的位置m，（注意m须小于总字符串长度）: \n");
    	scanf("%d",&m);
    	len = strlen(soul);
    	char *goal1 = new char[m+1];
    	char *goal2 = new char[len-m+1];
    	memcpy(goal2,&soul[m],len-m);
    	memcpy(goal1,&soul[0],m);
    	char c[30];
    	char *p;
    	p=c;
    	connect(goal2,goal1, p);
    	printf("%s\n",c); 
    	delete []goal1;
    	delete []goal2;
    	delete []p;
    	return 0;
    }

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