Array strings
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This document summarizes an lecture on applications of strings and pointers in C programming. It includes examples of using arrays of strings, pointer arithmetic, double pointers, scanf vs gets functions, generating Fibonacci series using recursion, and using the ceil() and floor() math functions. The lecture covers basic and advanced concepts of strings and pointers through examples and explanations.
![Radhesyam.V
Array of Strings
1. #include <stdio.h>
2. int main()
3. {
4. char charr[7][10] = {"sun","mon","tue","wed","thu","fri","sat"};
5. int i;
6. for(i=0;i<7;i++)
7. printf("%sn",charr[i]);
8. return 0;
9. }
2
Output:
sun
mon
tue
wed
thu
fri
sat](https://image.slidesharecdn.com/arraystrings-210415055644/85/Array-strings-2-320.jpg)
![Radhesyam.V
Array of Strings
1. #include <stdio.h>
2. Void main()
3. {
4. char charr[7][10];
5. int i;
6. printf("enter string");
7. for(i=0;i<7;i++)
8. scanf("%s",charr[i]);
9. printf("string is ");
10. for(i=0;i<7;i++)
11. printf("%sn",charr[i]);
12. }
3
Maximum no of strings
Maximum string length](https://image.slidesharecdn.com/arraystrings-210415055644/85/Array-strings-3-320.jpg)
Array strings
- 1. Lecture ON Applications of Strings & Pointers V.Radhesyam Assistant professor Department of IT:VRSEC
- 2. Radhesyam.V Array of Strings 1. #include <stdio.h> 2. int main() 3. { 4. char charr[7][10] = {"sun","mon","tue","wed","thu","fri","sat"}; 5. int i; 6. for(i=0;i<7;i++) 7. printf("%sn",charr[i]); 8. return 0; 9. } 2 Output: sun mon tue wed thu fri sat
- 3. Radhesyam.V Array of Strings 1. #include <stdio.h> 2. Void main() 3. { 4. char charr[7][10]; 5. int i; 6. printf("enter string"); 7. for(i=0;i<7;i++) 8. scanf("%s",charr[i]); 9. printf("string is "); 10. for(i=0;i<7;i++) 11. printf("%sn",charr[i]); 12. } 3 Maximum no of strings Maximum string length
- 4. Radhesyam.V Pointer arithmetic 4 1. void main() 2. { 3. int first, second, *p, *q, sum,sub,mul,di; 4. printf("Enter two integers n"); 5. scanf("%d%d", &first, &second); 6. p = &first; 7. q = &second; 8. sum = *p + *q; 9. sub = *p - *q; 10.mul = (*p) * (*q); 11.di = (*p) /(*q); 12.printf("Sum of the numbers = %dn", sum); 13.printf("Sub of the numbers = %dn", sub); 14.printf("mul of the numbers = %dn", mul); 15.printf("div of the numbers = %dn", di); 16.}
- 6. Radhesyam.V Double pointer Program 6 1. Void main() 2. { 3. int var = 120; 4. int *varptr = &var; 5. int **doubleptr = &varptr; 6. printf("Value of var = %dn", var ); 7. printf("Value of var pointer = %dn", *varptr ); 8. printf("Value of double pointer = %dn", **doubleptr); 9. printf("Address of var = %pn", &var ); 10. printf("Address of var pointer = %pn", &varptr ); 11. printf("Value in var pointer = %pn", varptr ); 12. printf("Address of double pointer = %pn", *doubleptr); 13. printf("Value in double pointer = %pn", doubleptr); 14. } Output: Value of var = 120 Value of var pointer = 120 Value of double pointer = 120 Address of var = 0x7ffe25192bfc Address of var pointer = 0x7ffe25192c00 Value in var pointer = 0x7ffe25192bfc Address of double pointer = 0x7ffe25192bfc Value in double pointer = 0x7ffe25192c00
- 7. Radhesyam.V Scanf vs gets 7 Scanf() Gets() scanf() function can read different data types. get() function will only get character string data. scanf() function takes the format string and list of addresses of variables. e.g. scanf(“%d”, &number); get() function takes the name of the variable to store the received value. e.g. gets(name); Read multiple values One string Scanf () reads input until it encounters whitespace, newline or End Of File (EOF) gets () reads input until it encounters newline or End Of File (EOF)
- 8. Radhesyam.V Fibonacci Series Using Recursion 1. int fib(int n) 2. { 3. if (n <= 1) 4. return n; 5. return fib(n-1) + fib(n-2); 6. } 7. int main () 8. { 9. int n = 9; 10. printf("%d", fib(n)); 11. getchar(); 12. return 0; 13. } 8
- 9. Radhesyam.V Ceil() #include <stdio.h> #include <math.h> int main() { double num = 8.33; int result; result = ceil(num); printf("Ceiling integer of %.2f = %d", num, result); return 0; } 9 Output: Ceiling integer of 8.33 = 9
- 10. Radhesyam.V Floor() #include <stdio.h> #include <math.h> int main() { double num = -8.33; int result; result = floor(num); printf("Floor integer of %.2f = %d", num, result); return 0; } 10 Output: Floor integer of -8.33 = -9