"C Language" and "algorithm" String concatenation Methods: C language String concatenation

"C Language" and "algorithm" String concatenation Methods: C language String concatenation

 

1 # include <stdio. h> 2 3 int main () {4 char str1 [20] = "Hello"; 5 char str2 [20] = "World! "; 6 char str3 [20]; 7 puts (strcat (str1, str2); 8 return 0; 9}Use a String concatenation function to merge two strings.

 

 

1 # include <stdio. h> 2 3/* 4 Note: Do not use a string to connect to function 5 to compile a program. Input three strings (no more than 20 characters in length) and store them in a two-dimensional arrays, 6. Connect the 3rd strings to the second string to form a new string and store it in the converted array. 7. Then, output the new string 8 x/9 10 int main () {11 char dest [61], str [3] [21]; 12 int I, j, k; 13 scanf ("% s ", str [0], str [1], str [2]); 14 k = 0; 15 for (I = 0; I <3; I ++) {16 for (j = 0; j <20; j ++) {17 if (str [I] [j] = '\ 0') 18 break; 19 else {20 dest [k] = str [I] [j]; 21 k ++; 22} 23} 24} 25 dest [k] = '\ 0 '; 26 printf ("% s", dest); 27 return 0; 28}Process the merge of two strings in an array Loop

 

 

1 # include <stdio. h> 2 3 int main () {4 char str1 [80], str2 [30], * ptr1 = str1, * ptr2 = str2; 5 printf ("input str1: "); 6 gets (str1); 7 printf (" input str2: "); 8 gets (str2); 9 printf (" str1 ---------- str2 \ n "); 10 printf ("% s ....... % s \ n ", ptr1, ptr2); 11 while (* ptr1) ptr1 ++;/* move the pointer to the end of the string */12 while (* ptr2) * ptr1 ++ = * ptr2 ++;/* connection string */13 * ptr1 = '\ 0';/* End mark of the write string */14 ptr1 = str1; ptr2 = str2; 15 printf ("str1 ---------- str2 \ n"); 16 printf ("% s ....... % s \ n ", ptr1, ptr2); 17 return 0; 18}Use Pointer variables pointing to strings to merge two strings