C program to arrange names in alphabetical order using pointers
In this post, you will learn how to arrange names in alphabetical order in the C programming language using pointers.
Alphabetical order is used for organizing information. It helps you find data quickly. This activity looks at using alphabetical order to find and arrange data.
A pointer is a variable whose value is the address of another variable, i.e., the direct address of the memory location. There are various types of pointers, such as null pointers, wild pointers, void pointers, and other types of pointers.
In the given C program, we have used pointers to arrange names in alphanetical order.
- This program takes the number of names in user input and then asks them to enter names and store them in an array using a for loop.
- Next, using a loop, the program checks the first character of all the words to compare and arrange them in alphabetical order.
- The strcmp() function is used to compare the strings. That is to check whether the first character of the first word is less than the first character of the second word or not.
- If it is, then using the strcpy() function, reverse the word with each and other and continue to check for the next word inside the same string and so on.
- At last, all the five words are sorted or arranged in alphabetical order according to the first character of the word.
#include<stdio.h>
#include<string.h>
int main(){
int i,j,num;
char str[100][100],temp[100];
printf("Enter number of names : ");
scanf("%d",&num);
printf("Enter names in any order:\n");
for(i=0;i<num;i++){
scanf("%s",str[i]);
}
for(i=0;i<num;i++){
for(j=i+1;j<num;j++){
if(strcmp(str[i],str[j])>0){
strcpy(temp,str[i]);
strcpy(str[i],str[j]);
strcpy(str[j],temp);
}
}
}
printf("\nThe sorted order of names: \n");
for(i=0;i<num;i++){
printf("%s\n",str[i]);
}
}
Output of the above code:
Enter number of names : 5
Enter names in any order:
Alex
Smith
Anny
Paul
Danny
The sorted order of names:
Alex
Anny
Danny
Paul
Smith
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