C语言成长学习题（十三）

 1 #include <stdio.h>
 2 
 3 void main(void)
 4 {
 5     char a[80];
 6     int i = 0, count = 0;
 7 
 8     gets(a);
 9     while (a[i] != ‘\0‘)
10     {
11         count++;
12         i++;
13     }
14     printf("%s = %d\n", a, count);
15 }

 1 #include <stdio.h>
 2 
 3 void main(void)
 4 {
 5     int i = 0;
 6     char a[50], b[50];
 7 
 8     gets(a);
 9     while (a[i] != ‘\0‘)
10     {
11         b[i] = a[i];
12         i++;
13     }
14     b[i] = ‘\0‘;
15     puts(b);
16 }

 1 #include <stdio.h>
 2 
 3 void main(void)
 4 {
 5     int i = 0, j = 0;
 6     char a[80], b[30];
 7     
 8     gets(a);
 9     gets(b);
10     while (a[i] != ‘\0‘)
11         i++;
12     while (b[j] != ‘\0‘)
13         a[i++] = b[j++];
14     a[i] = ‘\0‘;
15     puts(a);
16 }

 1 #include <stdio.h>
 2 
 3 void main(void)
 4 {
 5     int i = 0;
 6     char a[30], b[30];
 7 
 8     gets(a);
 9     gets(b);
10     
11     while (a[i] = b[i] && a[i] !=‘\0‘)
12         i++;
13     if (a[i] > b[i])
14         printf("第一个字符串大于第二个字符串.\n");
15     else if (a[i] == b[i])
16         printf("两个字符串相等.\n");
17     else
18         printf("第一个字符串小于第二个字符串.\n");
19 }

 1 #include <stdio.h>
 2 #include <math.h>
 3 
 4 #define N 6
 5 
 6 void main(void)
 7 {
 8     int a[N][N], i, j, k, spaces;
 9     for (i = 0; i < N; i++)
10         a[i][0] = a[i][i] = 1;
11     for (i = 2; i < N; i++)
12         for (j = 1; j < i; j++)
13             a[i][j] = a[i-1][j-1] + a[i-1][j];
14     for (i = 0; i < N; i++)
15     {
16         spaces = (N-i-1) * 3;
17         for (k = 0; k < spaces; k++)
18             printf(" ");
19         for (j = 0; j <= i; j++)
20             printf("%6d", a[i][j]);
21         printf("\n");
22     }
23 }