学习language C

不解释.

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int main(){ int i; char * msg =  (char *)malloc(6); char buff[] = "2mxbc"; char onechar; for(i=0;i <  strlen(buff);i++)    printf("the %d char is %c",i,buff[i]);   printf("the length of buff is %d",strlen(buff));   memcpy((char *)msg,buff,strlen(buff)); for(i=0;i < = strlen(buff);i++)     printf("the %d char is %c",i,msg[i]);   for(i=0;i <  strlen(buff)-1;i++)     msg[i]=msg[i+1];   for(i=0;i <  strlen(buff);i++)     printf("After copy the %d char is %c",i,msg[i]);   strncpy(&onechar,&msg[4],1); printf("the char is %d",onechar); return 0; }