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User Input in C

Understanding user input in C involves grasping the different functions available to read data from the user and how to properly handle various types of input. Here’s an in-depth look at handling user input in C.

Scanf() function :

The scanf function is used for reading formatted input. It reads data from the standard input stream stdin based on the format specifiers provided. Common format specifiers include %d for integers, %f for floats, %c for characters, and %s for strings.

syntax :

scanf(format, &variable);
Example :
int number; scanf("%d", &number);

Basic example of user input :

C Code

													
#include <stdio.h>
main() {
    int number;

    // Prompt the user to enter a number
    printf("Enter a number: ");

    // Read the number entered by the user
    scanf("%d", &number);

    // Display the number entered by the user
    printf("You entered: %d\n", number);

}

Output :
Enter a number: 5
You entered: 5

Problems & solutions :

C Code

													# Write a program to accept the marks of student in Physics, Chemistry and Biology. Display the total marks and average marks. 
                                                      
#include<stdio.h>
main()
{
	float p,c,b,t,a;
	printf("Enter the marks in physics: ");
	scanf("%f",&p);
	printf("Enter the marks in chemistry : ");
	scanf("%f",&c);
	printf("Enter the marks in biology : ");
	scanf("%f",&b);
	t=p+c+b;
	a=(p+c+b)/3;
	printf("Total marks obtained=%f",t);
	printf("Average marks obtained=%f",a);
}
                                                       

													
												

Output :
Enter the marks in physics: 70
Enter the marks in chemistry : 80
Enter the marks in biology : 90
Total marks obtained=240.000000
Average marks obtained=80.000000

C Code

													# Write a program to find area of Rhombus.
                                                      
#include<stdio.h>
main()
{
	int a,d1,d2;
	printf("Enter the value of d1 :");
	scanf("%d",&d1);
	printf("Enter the value of d2 :");
	scanf("%d",&d2);
	a=(d1*d2)/2;
	printf("Area=%d",a);
	
}
                                                       

													
												

Output :
Enter the value of d1 :8
Enter the value of d2 :4
Area=16

C Code

													# Write a program to find the base area , surface area and volume of square pyramid. 
                                                      
#include<stdio.h>
main()
{
	int B,S,V,b,s,h;
	printf("Enter the value of b:");
	scanf("%d",&b);
	printf("Enter the value of s:");
	scanf("%d",&s);
	printf("Enter the value of h:");
	scanf("%d",&h);
	B=b*b;
	S=2*b*s+b*b;
	V=1/3*b*b*h;
	printf("Base area=%d",B);
	printf("Surface Area=%d",S);
	printf("Volume=%d",V);
}
                                                       

													
												

Output :
Enter the value of b:5
Enter the value of s:10
Enter the value of h:15
Base area=25
Surface Area=125
Volume=125

Conclusion :

User input plays a crucial role in programming and software development by enabling interactivity, customization, flexibility, decision-making, data acquisition, error detection, collaboration, and innovation. Incorporating user input effectively enhances user experiences, drives user engagement, and contributes to the success of software products and services.

User Input in C

Scanf() function :

syntax :

Basic example of user input :

Problems & solutions :

Conclusion :

C All Chapters

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