Differences

This shows you the differences between two versions of the page.

@@ Line 1: / Line 1: @@
+====== Strings (Example 1) ======
+**Concepts:**\\
+String and library functions for their manipulation (library ''string.h'')
+**Text:**\\
+Implements a C program that:
+  * declares three strings (i.e., arrays of characters), ''str1'' and ''str2'' of dimension ''N'' e ''str3'' whose dimension is obtaining directly during its initialization.
+  * prints ''str3''
+  * acquires a string in ''str1''
+  * copy ''str1'' in ''str2''
+  * prints ''str2''
+  * prints the length of ''str2''
+  * reduces the dimension of ''str2'' writing the character '\0' in place of the fourth character of ''str2''
+  * prints the new obtained string ''str2''
+  * compares the content of ''str1'' and ''str2'', printing if they are equal or different
+**Solution:**\\
+<file C string_1.c>
+/*
+  Example about the utilization of strings and the string.h library
+*/
+#include <stdio.h>
+#include <string.h>
+#define N 20
+int main(){
+  char str1[N], str2[N], str3[]="abc";
+  printf("STR3 : %s\n", str3);
+  /*scanf("%s", str1);*/ /* Read only a word */
+  gets(str1); /* Read the whole line */
+  printf("STR1 : %s\n", str1);
+  strcpy(str2, str1); /* Copy the content of str1 in str2 */
+  printf("STR2 : %s\n", str2);
+  printf("LEN  : %d\n", (int)strlen(str2)); /* strlen returns the length of a string */
+  str2[3] = '\0'; /* Writes the end-of-string character '\0' in the position number 3 of the array of character. The string is truncated at position 2 (the resulting string is therefore formed by only 3 characters) */
+  printf("STR2b: %s\n", str2 );
+  if (strcmp(str1, str2)==0){ /* The function strcmp returns 0 if the two strings are equals, a value other than 0 if they are different (<0 if str1 is less than str2, >0 if str1 is greater than str2 */
+    printf("str1 is equal to str2\n");
+  }else{
+    printf("str1 different from str2\n");
+  }
+  return 0;
+}
+</file>

If you found any error, or if you want to partecipate to the editing of this wiki, please contact: admin [at] skenz.it

You can reuse, distribute or modify the content of this page, but you must cite in any document (or webpage) this url: https://www.skenz.it/cs/c_language/strings_1?do=diff&rev2%5B0%5D=&rev2%5B1%5D=1551188114&difftype=sidebyside