Problem solving questions on strings | C langugage

 Problem solving questions on strings | C Language 



Strings is the important part of C language . Strings also known as char array.

  • Char array is used to store strings
  • A string is the sequence of char
  • Whenever a string is stored in char array its end is marked with a special NULL char i.e. '\0'
  • Char array can be created by using char datatype
  • Syntax: char arrayname[size];
  • for ex: char a[10];
Examples :

  • char a[5]={'f','s','a','\0'};
  • char a[]={'f','s','a','\0'};
  • char a[5]="ram";
  • char a[]="ram";
So below there are lot of examples based on string is given .Also we have created a blog where we have uploaded lots of problem solving questions on array. You can easily find that blog on this page.

1*// wap to display a string
#include<stdio.h>
main()
{
char a[20];
printf("Enter the string\n");
scanf("%s",a);
printf("Hello %s",a);
}
Output:
Enter the string
Tilak
Hello Tilak

2*#include<stdio.h>
main()
{
    char a[20];
    printf("Enter the string\n");
    gets(a);
    printf("Hello ");
    puts(a);
}

Output:
Enter the string
Tilak Bhusare
Hello Tilak Bhusare

3*// WAP to read a string and find length without using library function.
#include<stdio.h>
main()
{
    char a[50];
    int i;
    printf("Enter the string\n");
    gets(a);
    while(a[i]!='\0')
    {
     i++;
    }
    printf("Length is %d",i);
}

Output:
Enter the string
Tilak Sanjay Bhusare
Length is 20  // The compiler itself count the spaces along with char { char 18 spaces 2 total 20}

4*// WAP to read string and count total no of char 'a' in it.
#include<stdio.h>
main()
{
    char a[50];
    int i,c=0;
    printf("Enter the string\n");
    gets(a);
    for(i=0;a[i]!='\0';i++)
    {
        if(a[i]=='a')
        c=c+1;
    }
    printf("Total no 'a' is %d",c);
}

Output:
Enter the string
India
Total no 'a' is 1

5*// WAP to read string and count total no of vowels in it.
#include<stdio.h>
main()
{
    char a[50];
    int i,c=0;
    printf("Enter the string\n");
    gets(a);
    while(a[i]!='\0')
    {
        if(a[i]=='a'||a[i]=='A'||a[i]=='e'||a[i]=='E'||a[i]=='i'||a[i]=='I'||a[i]=='o'||a[i]=='O'||a[i]=='u'||a[i]=='U')
        c=c+1;
        i++;
    }
    printf("total no of vowels are : %d",c);

}

Output:
Enter the string
Amravati
total no of vowels are : 4

6*// WAP to read string and count total no of words in it.
#include<stdio.h>
main()
{

    char a[100];
    int i,c=0;
    printf("Enter the string\n");
    gets(a);
    for(i=0;a[i]!='\0';i++)
    {
        if(a[i]==' ')
            c=c+1;
    }
    printf("Total no of words are : %d",c);
}

Output:
Enter the string
I Love Programming
Total no of words are : 3

7*// Wap to  read string and convert it into upper case.
#include<stdio.h>
main()
{
    char a[50];
    int i;
    printf("Enter the string\n");
    gets(a);
    while(a[i]!='\0')
    {
        if(a[i]>='a' && a[i]<='z')
        a[i]=a[i]-32;
        i++;
    }
    printf("Result is %s",a);
}

Output:
Enter the string
amravati
Result is AMRAVATI

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