Answer to Question #218620 in C for Hemambar

Question

write a C program to convert the string "CEASER " to "HJFXJW "without using inbuilt function

Answer 1

#include<stdio.h>


int main()
{
	char text[50] = "CEASER";
	char letter;
	int i, key = 5;
	printf("Text: %s\n",text);
	printf("Key: %d\n",key);
	for(i = 0; text[i] != '\0'; i++){
		letter = text[i];
		if(letter >= 'a' && letter <= 'z'){
			letter = letter + key;
			if(letter > 'z'){
				letter = letter - 'z' + 'a' - 1;
			}
			text[i] = letter;
		}
		else if(letter >= 'A' && letter <= 'Z'){
			letter = letter + key;
			if(letter > 'Z'){
				letter = letter - 'Z' + 'A' - 1;
			}
			text[i] = letter;
		}
	}
	printf("Encrypted text: %s", text);


	getchar();
	getchar();
	return 0;
}