cs:c_language:strings_1
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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
andstr2
of dimensionN
estr3
whose dimension is obtaining directly during its initialization. - prints
str3
- acquires a string in
str1
- copy
str1
instr2
- prints
str2
- prints the length of
str2
- reduces the dimension of
str2
writing the character '\0' in place of the fourth character ofstr2
- prints the new obtained string
str2
- compares the content of
str1
andstr2
, printing if they are equal or different
Solution:
- 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; }
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/web/htdocs/www.skenz.it/home/data/pages/cs/c_language/strings_1.txt · Last modified: 2024/04/08 22:35 by 127.0.0.1