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Level 1

1.

Point out the errors in the following codes:

#include <stdio.h>
int main(){
    printf(Hello);
    return 0;
}

#include <stdio.h>
int main(){
    printf("Hello");
    return 0;
}
printf("Hello") insteaad of printf(Hello)

2.

Point out the errors in the following codes:

#include <stdio.h>
/*Using comment
/*This is a comment*/
*/
int main(){
    printf("Hello\n");
    return 0;
}

Comment inside comment is invalid

3.

Point out the errors in the following codes:

#include <stdio.h>
int main(){
    printf("Hello")
    return 0
}

#include <stdio.h>
int main(){
    printf("Hello");
    return 0;
}
Missing ;

4.

Point out the errors in the following codes:

int main(){
    printf(Hello);
    return 0;
}

#include <stdio.h>
int main(){
    printf("Hello");
    return 0;
}
stdio.h not included

Level 2

1.

Write a C program to print
*
**
***
****
on screen.

#include <stdio.h>
main() {
	printf("*\n");
	printf("**\n");
	printf("***\n");
	printf("****\n");
}

2.

Store two integers in two variables x and y. Print the sum of the two.

#include <stdio.h>
main() {
	int x, y, sum;  //declaration of integer variables
	x = 3;
	y = 5;
	sum = x + y;
	printf("%d\n", sum);
}

3.

Store two integers in two variables x and y. Print the product of the two.

#include <stdio.h>
main() {
	int x, y, product;  //declaration of integer variables
	x = 3;
	y = 5;
	product = x * y;
	printf("%d\n", product);
}

4.

Print the following pattern on the screen
****
 ** 
  *  
 ** 
****


5.

Write a C program to take two integer inputs from user and print the sum and the product of them.

#include <stdio.h>
main() {
	int x, y, sum, product;
	scanf("%d", &x);                 //taking input for value of x
	scanf("%d", &y);                 //taking input for value of y
	sum = x + y;
	product = x * y;
	printf("sum = %d\n", sum);
	printf("product = %d\n", product);
}

6.

Take two integer inputs from the user. First calculate the sum of two then product of two. Finally, print the sum and the product of both obtained results.

#include <stdio.h>
main() {
	int x, y, sum, product;
	scanf("%d", &x);                 //taking input for value of x
	scanf("%d", &y);                 //taking input for value of y
	sum = (x + y) + (x * y);
	product = (x + y) * (x * y);
	printf("sum = %d\n", sum);
	printf("product = %d\n", product);
}
									

Level 3

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