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//pStr是指向以'\0'結尾的字符串的指針
//steps是要求移動(dòng)的n位
void LoopMove(char * pStr, int steps);

#include <stdio.h>
#include <string.h>
#define MAX_LEN 100
void LoopMove(char *pStr, int steps){
    int n = strlen(pStr) - steps;
    char tmp[MAX_LEN];
    memcpy(tmp, pStr+n, steps);  //拷貝字符串
    memcpy(pStr+steps, pStr, n);
    memcpy(pStr, tmp, steps);  //合并得到結果
}
int main(){
    char str[] = "www.coderbbs.com";
    LoopMove(str, 3);
    printf("%s\n", str);
    return 0;
}

#include <stdio.h>
#include <string.h>
#define MAX_LEN 100
void LoopMove(char *pStr, int steps){
    int n = strlen(pStr) - steps;
    char tmp[MAX_LEN];
    strcpy(tmp, pStr+n);  //拷貝字符串
    strcpy(tmp+steps, pStr);
    *(tmp + strlen(pStr)) = '\0';
    strcpy(pStr, tmp);  //合并得到結果
}
int main(){
    char str[] = "www.coderbbs.com";
    LoopMove(str, 3);
    printf("%s\n", str);
    return 0;
}