C/C++学習中に遭遇した問題のまとめ(進行時)

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

void LoopMove(char *source,int steps)
{
  char *temp =(char *)malloc(strlen(source)+1);
  if(temp != NULL)
  {
     printf("malloc true
");
  }else
  {
     printf("f");
     temp = (char *)malloc(100);
  }
  strcpy(temp,source);
  int len = strlen(source)-steps;
  strcpy(source+0,temp+len);
  strcpy(source+steps,temp);
  *(source+strlen(temp))='\0';
}

int main(void)
{
   char s[] ="abcd1234";
   LoopMove(s,3);
   printf("%s
",s);
   return 0;
}

int main(void)
{
    char *s ="abcd1234"; 
    LoopMove(s,3) ;//   LoopMove("abcd1234",3);
    printf("%s
",s);
    return 0;
}