1032: C语言程序设计教程（第三版）课后习题8.6

 1 #include <stdio.h>
 2 #include <string.h>
 3 
 4 void str_cat(char s1[], char s2[])
 5 {
 6     int l1 = strlen(s1);
 7     int l2 = strlen(s2);
 8     int i;
 9 
10     for(i = l1; i < l1 + l2; i++)
11     {
12         s1[i] = s2[i-l1];
13     }
14 
15     s1[i] = ‘\0‘;
16 }
17 
18 int main(int argc, char const *argv[])
19 {
20     char s1[81], s2[81];
21     
22     scanf("%s", s1);
23     scanf("%s", s2);
24 
25     str_cat(s1, s2);
26 
27     printf("%s\n", s1);
28     return 0;
29 }