C Exercises: Calculate the length of the string
C Pointer : Exercise-10 with Solution
Write a program in C to Calculate the length of the string using a pointer.
Pictorial Presentation:
Sample Solution:
C Code:
#include <stdio.h>
int calculateLength(char*);
void main()
{
char str1[25];
int l;
printf("\n\n Pointer : Calculate the length of the string :\n");
printf("---------------------------------------------------\n");
printf(" Input a string : ");
fgets(str1, sizeof str1, stdin);
l = calculateLength(str1);
printf(" The length of the given string %s is : %d ", str1, l-1);
printf("\n\n");
}
int calculateLength(char* ch) // ch = base address of array str1 ( &str1[0] )
{
int ctr = 0;
while (*ch != '\0')
{
ctr++;
ch++;
}
return ctr;
}
Sample Output:
Pointer : Calculate the length of the string : --------------------------------------------------- Input a string : w3resource The length of the given string w3resource is : 10
Flowchart:
C Programming Code Editor:
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Next: Write a program in C to swap elements using call by reference.
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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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