C Programming: Extract a substring from a given string
C String: Exercise-13 with Solution
Write a program in C to extract a substring from a given string.
Sample Solution:
C Code:
#include <stdio.h>
void main()
{
char str[100], sstr[100];
int pos, l, c = 0;
printf("\n\nExtract a substring from a given string:\n");
printf("--------------------------------------------\n");
printf("Input the string : ");
fgets(str, sizeof str, stdin);
printf("Input the position to start extraction :");
scanf("%d", &pos);
printf("Input the length of substring :");
scanf("%d", &l);
while (c < l)
{
sstr[c] = str[pos+c-1];
c++;
}
sstr[c] = '\0';
printf("The substring retrieve from the string is : \" %s\ "\n\n", sstr);
}
Sample Output:
Extract a substring from a given string: -------------------------------------------- Input the string : This is test string Input the position to start extraction :9 Input the length of substring :4 The substring retrieve from the string is : " test "
Flowchart :
C Programming Code Editor:
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Previous: Write a program in C to read a string through keyboard and sort it using bubble sort.
Next: Write a C program to check whether a given substring is present in the given string.
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C Programming: Tips of the Day
Static variable inside of a function in C
The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().
The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.
The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().
Ref : https://bit.ly/3fOq7XP
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