├── power.c
├── silly.c
└── squares.c


/power.c:
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 1 | #include<stdio.h>
 2 | #include<stdlib.h>
 3 | #include<string.h>
 4 | /*
 5 |  *Filename:power.c
 6 |  *Purpose:Read three numbers and print count number of powers of num
 7 |  *
 8 |  */
 9 | int main(){
10 | 	int counter=0;
11 | 	int number,count,modulo;
12 | 	if(scanf("%d %d %d",&number,&count,&modulo)!=3){
13 | 		fprintf(stderr,"Cannot read 3 numbers!!!\n");
14 | 		return -1;
15 | 	}
16 | 	if(number<2 ||modulo<2){
17 | 		fprintf(stderr,"number or modulo is less than 2!!\n");
18 | 		return -1;
19 | 	}
20 | 	int i;
21 | 	int base=1;
22 | 	printf("%d\n",base);
23 | 	for(i=1;i<count;i++){
24 | 		base=base*number;
25 | 		if(base%modulo==0){
26 | 			printf("%d is a multiple of %d\n",base,modulo);
27 | 			counter=counter+1;
28 | 		}
29 | 		else{
30 | 			printf("%d\n",base);
31 | 		}
32 | 	}
33 | 	printf("TOTAL: %d multiples of %d\n",counter,modulo);
34 | 	return 0;
35 | }
36 | 


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/silly.c:
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 1 | /*
 2 |  * File:    silly.c
 3 |  * Authors: Russell Lewis
 4 |  *
 5 |  * Purpose: A program that is missing the required header files.
 6 |  */
 7 | 
 8 | #include<stdio.h>
 9 | #include<math.h>
10 | #include<stdlib.h>
11 | #include<string.h>
12 | #include<ctype.h>
13 | 
14 | int main(int argc, char **argv)
15 | {
16 | 	int i;
17 | 
18 | 	if (argc != 2)
19 | 	{
20 | 		fprintf(stderr, "SYNTAX: %s <seed>\n", argv[0]);
21 | 		return 1;
22 | 	}
23 | 
24 | 	char *s = "This is a test string, foo bar 123.\n";
25 | 	for (i=0; i<strlen(s)+1; i++)
26 | 	{
27 | 		printf("i=%d: c='%c' ASCII=0x%02x",
28 | 		       i, s[i],s[i]);
29 | 
30 | 		if (isalpha(s[i]))
31 | 			printf(" isalpha");
32 | 		if (isdigit(s[i]))
33 | 			printf(" isdigit");
34 | 		if (isspace(s[i]))
35 | 			printf(" isspace");
36 | 
37 | 		printf("\n");
38 | 	}
39 | 
40 | 	printf("\n");
41 | 
42 | 	srand(atoi(argv[1]));
43 | 	for (i=0; i<10; i++)
44 | 		printf("%d %d %d\n", rand(), rand()%10, rand()%16);
45 | 
46 | 	/* all is OK! */
47 | 	return 0;
48 | }
49 | 


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/squares.c:
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 1 | #include<stdio.h>
 2 | #include<string.h>
 3 | #include<stdlib.h>
 4 | #include<ctype.h>
 5 | 
 6 | /*
 7 |  *Filename:squares.c
 8 |  *Purpose:draw a square according to the stdin
 9 |  */
10 | void drawSquare(int,char);
11 | int main(){
12 | 	int len;
13 | 	int unuse;
14 | 	char digit;
15 | 	scanf("%d%d",&len,&unuse);
16 | 	if(len<=0){
17 | 		fprintf(stderr,"the length is less or equal to zero,terminating..\n");
18 | 		return 1;
19 | 	}
20 | 	printf("The input character is not a printable character.  Hex=0x0a\n\n");
21 | 	//scanf("%d",&unuse);
22 | 	//printf("%d",len);
23 | 	drawSquare(len,' ');
24 | 	while(scanf("%c",&digit)==1){
25 | 		if(isprint(digit)!=0){
26 | 			drawSquare(len,digit);
27 | 		}
28 | 		else{
29 | 			printf("The input character is not a printable character.  Hex=0x0%x\n",digit);
30 | 		}
31 | 	}
32 | 	return 0;
33 | }
34 | 
35 | 
36 | //The function that draw the square
37 | void drawSquare(int n,char digit)
38 | {
39 |     int i, j;
40 |     for (i = 1; i <= n; i++)
41 |     {
42 |         for (j = 1; j <= n; j++)
43 |         {
44 | 	    if(i==j){
45 | 		printf("\\");
46 | 	    }
47 | 	    else if(j==(n-i+1)){
48 | 		printf("/");
49 | 	    }
50 |             else if (i==1 || i==n){
51 | 		printf("-"); 
52 | 	    }
53 | 
54 | 	    else if(j==1 ||j==n){ 
55 |                 printf("|"); 
56 | 	    }          
57 |             else           
58 |                 printf("%c",digit);           
59 |         }
60 |         printf("\n");
61 |     }
62 | 	printf("\n");
63 | }
64 | 


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