1+ #include < stdio.h>
2+
3+ int main111 (){
4+
5+ const int a = (' A' , ' a' );
6+ printf (" %c" , (' A' , ' a' ));
7+
8+ char s[] = " Beijing ligong daxue" ;
9+ int i, j;
10+ for (i = j = 0 ; s[i] != ' \0 ' ; i++){
11+ if (s[i] != ' ' ){
12+ s[j++] = s[i];
13+ }else {
14+ }
15+ }
16+ s[j] = ' \0 ' ;
17+ printf (" %s" , s);
18+ return 0 ;
19+ }
20+
21+ int main22 (){
22+
23+ long num = 0 ;
24+ FILE* fp = NULL ;
25+
26+ if ((fp = fopen (" fname.dat" , " r" )) == nullptr ){
27+ printf (" Can't open the file! " );
28+ // exit(0);
29+ }
30+
31+ while (!feof (fp)){
32+ fgetc (fp);
33+ num++;
34+ }
35+
36+ printf (" num=%d\n " , num);
37+ fclose (fp);
38+ }
39+
40+ void revstr (char * s){
41+
42+ char * p = s, c;
43+ while (*p) p++;
44+ p--;
45+
46+ if (s < p){
47+ c = *s;
48+ *s = *p;
49+ *p =' \0 ' ;
50+ revstr (s+1 );
51+ *p = c;
52+ }
53+ }
54+
55+ int main123123 (){
56+
57+ char t[] = " abcde" ;
58+ revstr (t);
59+ printf (" %s\n " , t);
60+ return 0 ;
61+ }
62+
63+ #include < stdio.h>
64+
65+ // int pow3(int n, int x){
66+
67+ // int i, last;
68+ // for(last = 1, i = 1, i <= x; i++)
69+ // last = /**/;
70+
71+ // return last;
72+ // }
73+
74+ // int main(){
75+
76+ // int x, n, min, flag=1;
77+ // scanf("%d", &n);
78+
79+ // for(min = 2; flag; min++)
80+ // for(x=1; x < min && flag; x++)
81+ // if(/**/ && pow3(n, x) == pow3(n, min-x)){
82+ // printf("x=%d,y=%d", x, min-x);
83+ // /**/
84+ // }
85+ // return 0;
86+ // }
87+
88+ // /******************************************************************************
89+
90+ // Online C Compiler.
91+ // Code, Compile, Run and Debug C program online.
92+ // Write your code in this editor and press "Run" button to compile and execute it.
93+
94+ // *******************************************************************************/
95+
96+ #include < stdio.h>
97+ int pow3 (int n, int x){
98+ int i, last;
99+ for (last = 1 , i = 1 ; i <= x ; i++)
100+ last = last * n;
101+ return (last);
102+ }
103+
104+ int main (){
105+ int x,n,min, flag = 1 ;
106+ scanf (" %d" ,&n);
107+ for (min = 2 ; flag; min++)
108+ for (x = 1 ; x< min&&flag; x++)
109+ if ((x != min - x) && pow3 (n, x) == pow3 (n, min - x)){
110+ printf (" x=%d,y = %d" ,x,min- x);
111+ flag = 0 ;
112+ }
113+ return 0 ;
114+ }
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