C Exercises: Print a string in reverse order
C Pointer : Exercise-22 with Solution
Write a program in C to print a string in reverse using a pointer.
Sample Solution:
C Code:
#include <stdio.h>
int main()
{
char str1[50];
char revstr[50];
char *stptr = str1;
char *rvptr = revstr;
int i=-1;
printf("\n\n Pointer : Print a string in reverse order :\n");
printf("------------------------------------------------\n");
printf(" Input a string : ");
scanf("%s",str1);
while(*stptr)
{
stptr++;
i++;
}
while(i>=0)
{
stptr--;
*rvptr = *stptr;
rvptr++;
--i;
}
*rvptr='\0';
printf(" Reverse of the string is : %s\n\n",revstr);
return 0;
}
Sample Output:
Pointer : Print a string in reverse order : ------------------------------------------------ Input a string : w3resource Reverse of the string is : ecruoser3w
Flowchart:
C Programming Code Editor:
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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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