Class 11: C Programming Lab Solutions (Sequential, If-Else, Switch Case)
1. WAP to display your name, age, and address.
#include <stdio.h>
int main() {
char name[50], address[50];
int age;
printf("Enter name: ");
scanf("%s", name);
printf("Enter age: ");
scanf("%d", &age);
printf("Enter address: ");
scanf("%s", address);
printf("\nName: %s\nAge: %d\nAddress: %s", name, age, address);
return 0;
}
Output:
Enter name: Ram
Enter age: 25
Enter address: Kathmandu
Name: Ram
Age: 25
Address: Kathmandu
2. WAP to find area of a circle.
#include <stdio.h>
int main() {
float r, area;
printf("Enter radius: ");
scanf("%f", &r);
area = 3.14 * r * r;
printf("Area = %.2f", area);
return 0;
}
Output:
Enter radius: 5
Area = 78.50
3. WAP to find circumference of a circle.
#include <stdio.h>
int main() {
float r, c;
printf("Enter radius: ");
scanf("%f", &r);
c = 2 * 3.14 * r;
printf("Circumference = %.2f", c);
return 0;
}
Output:
Enter radius: 5
Circumference = 31.40
4. WAP to find area of rectangle.
#include <stdio.h>
int main() {
float l, b;
printf("Enter length and breadth: ");
scanf("%f %f", &l, &b);
printf("Area = %.2f", l * b);
return 0;
}
Output:
Enter length and breadth: 5 4
Area = 20.00
5. WAP to find area of a square.
#include <stdio.h>
int main() {
float s;
printf("Enter side: ");
scanf("%f", &s);
printf("Area = %.2f", s * s);
return 0;
}
Output:
Enter side: 6
Area = 36.00
6. WAP to calculate simple interest.
#include <stdio.h>
int main() {
float p, t, r;
printf("Enter P T R: ");
scanf("%f %f %f", &p, &t, &r);
printf("SI = %.2f", (p * t * r) / 100);
return 0;
}
Output:
Enter P T R: 1000 2 10
SI = 200.00
7. WAP to read marks of five subjects and calculate total marks and percentage.
#include <stdio.h>
int main() {
float m1, m2, m3, m4, m5, total, percentage;
printf("Enter marks: ");
scanf("%f %f %f %f %f", &m1, &m2, &m3, &m4, &m5);
total = m1 + m2 + m3 + m4 + m5;
percentage = total / 5;
printf("Total = %.2f\nPercentage = %.2f%%", total, percentage);
return 0;
}
Output:
Enter marks: 70 80 90 60 50
Total = 350.00
Percentage = 70.00%
8. WAP to read a number if it is positive or negative.
#include <stdio.h>
int main() {
int n;
printf("Enter number: ");
scanf("%d", &n);
if(n >= 0)
printf("Positive");
else
printf("Negative");
return 0;
}
Output:
Enter number: -3
Negative
9. WAP to read a mark in a subject and decide if a student is pass or fail.
#include <stdio.h>
int main() {
float m;
printf("Enter marks: ");
scanf("%f", &m);
if(m >= 40)
printf("Pass");
else
printf("Fail");
return 0;
}
Output:
Enter marks: 35
Fail
10. WAP to read a number and decide if it is odd or even.
#include <stdio.h>
int main() {
int n;
printf("Enter number: ");
scanf("%d", &n);
if(n % 2 == 0)
printf("Even");
else
printf("Odd");
return 0;
}
Output:
Enter number: 8
Even
11. WAP to read a number and decide if it is divisible by 3 or not.
#include <stdio.h>
int main() {
int n;
printf("Enter number: ");
scanf("%d", &n);
if(n % 3 == 0)
printf("Divisible");
else
printf("Not Divisible");
return 0;
}
Output:
Enter number: 7
Not Divisible
12. WAP to read two numbers and decide if they are equal or not.
#include <stdio.h>
int main() {
int a, b;
printf("Enter two numbers: ");
scanf("%d %d", &a, &b);
if(a == b)
printf("Equal");
else
printf("Not Equal");
return 0;
}
Output:
Enter two numbers: 5 5
Equal
13. WAP to read two numbers and find greatest among them.
#include <stdio.h>
int main() {
int a, b;
printf("Enter two numbers: ");
scanf("%d %d", &a, &b);
if(a > b)
printf("%d is greatest", a);
else
printf("%d is greatest", b);
return 0;
}
Output:
Enter two numbers: 10 6
10 is greatest
14. WAP to read three numbers and find the smallest number among them, and also check if they are equal.
#include <stdio.h>
int main() {
int a, b, c;
printf("Enter three numbers: ");
scanf("%d %d %d", &a, &b, &c);
if(a == b && b == c)
printf("All equal");
else if(a <= b && a <= c)
printf("Smallest = %d", a);
else if(b <= a && b <= c)
printf("Smallest = %d", b);
else
printf("Smallest = %d", c);
return 0;
}
Output:
Enter three numbers: 3 7 2
Smallest = 2
15. WAP to read marks of 5 subjects and display the grade of students based on the percentage obtained.
#include <stdio.h>
int main() {
float per;
printf("Enter percentage: ");
scanf("%f", &per);
if(per >= 90)
printf("A");
else if(per >= 80)
printf("B");
else if(per >= 70)
printf("C");
else if(per >= 40)
printf("D");
else
printf("Fail");
return 0;
}
Output:
Enter percentage: 75
C
16. WAP to display name of days of a week using switch case.
#include <stdio.h>
int main() {
int d;
printf("Enter day (1-7): ");
scanf("%d", &d);
switch(d) {
case 1: printf("Sunday"); break;
case 2: printf("Monday"); break;
case 3: printf("Tuesday"); break;
case 4: printf("Wednesday"); break;
case 5: printf("Thursday"); break;
case 6: printf("Friday"); break;
case 7: printf("Saturday"); break;
default: printf("Invalid");
}
return 0;
}
Output:
Enter day (1-7): 3
Tuesday
17. WAP to perform addition, subtraction, multiplication, and division operation based on a character input provided.
#include <stdio.h>
int main() {
float a, b;
char op;
printf("Enter operator (+,-,*,/): ");
scanf(" %c", &op);
printf("Enter two numbers: ");
scanf("%f %f", &a, &b);
switch(op) {
case '+': printf("Sum = %.2f", a + b); break;
case '-': printf("Diff = %.2f", a - b); break;
case '*': printf("Mul = %.2f", a * b); break;
case '/': printf("Div = %.2f", a / b); break;
default: printf("Invalid");
}
return 0;
}
Output:
Enter operator: *
Enter two numbers: 4 5
Mul = 20.00
18. WAP to check if an alphabet is Vowel or Consonant using switch case.
#include <stdio.h>
int main() {
char ch;
printf("Enter character: ");
scanf(" %c", &ch);
switch(ch) {
case 'a': case 'e': case 'i': case 'o': case 'u':
case 'A': case 'E': case 'I': case 'O': case 'U':
printf("Vowel");
break;
default:
printf("Consonant");
}
return 0;
}
Output:
Enter character: b
Consonant
