c，废我一天时间

int arr[5] = {1,2, 3,4, 5,6};

int arr[5] = 0, 1, 2, 3, 4, 5;

int arr[5]; arr={1,2,3,4,5};

int arr[5]={0,0,2};

int b[3][3]={0,1,2,0,1,2}, i, j, t=1;

for (i=0;i<3;i++)

for (j=1;j<3;j++)

{ t+=b[i][b[j][i]]; }

printf ( "%d\n", t) ;

int i, t[ ][3] = ｛9, 8, 7, 6, 5,4, 3, 2, 1};

for (i=0;i<3;i++)

printf( "%d ",t[2- i][i]);

#include <stdio.h>
#include < string.h>
void main ( )
{
char ss [10] ="12345";
gets(ss) ;
strcat(ss, "6789");
printf("%s\n",ss);
}

char x[ ] = "abcdefg";
char y[]={‘a’ ,’ b’ ,’ c’ ,’ d’ ,’ e’ ,’ f’ ,’g’ };

char s[]={“ 012xy” }；

int i,n=0;

for (i=0; s[i]!='\0';i++)

if(s[i]>='a'&&s[i]<='z') n++;

printf(“ %d\n” ,n);

void main ( )

{

char st [20] =” hello\0\t\\\” ;

printf (“%d %d\n” , strlen (st), sizeof (st));

}

main( )

{

     char a[]="I am a boy.",b[20];

     int i;

    for(i=0;a[i]!='\0';i++)

    {

        ____;

    }

    ____;

}