C语言的知识点

int ispalin(char s[],int left,int right)
{
 if(left>=right)
     return 1;
 if(s[left]==s[right])
     return   ispalin(s,left+1,right-1);
 return 0;

}

int main()
{
    
char *st="abcdcba";

int num=ispalin(st,0,6);
printf("num=%d\n",num);

}

int main()
{
    
int i, a[6];
srand((unsigned) time(NULL));

for(i=0; i<6; i++)
{
   a[i]=rand()%100+1; //生成[1,100]随机数
   printf("%d\n",a[i]);
}

}

    char s1[12]="sdfffg";
    char s2[]="ert";

    strcat(s1,s2);
    puts(s1);

char s1[12]="sdfffg";
    char s2[]="ert";

    strcpy(s1,s2);
    puts(s1);

char s1[12]="sdfffg";
    char s2[]="ert";

    
    printf("s1,s2的大小情况%d\n",strcmp(s1,s2));

    char s1[12]="sdfgk";
    
    printf("s1=%d\n",strlen(s1));