Question

Write a program that finds either the largest or smallest of the ten numbers as command-line arguments. With –l for largest and –s for smallest number, if the user enters an invalid option, the program should display an error message.

Example runs of the program:

./find_largest_smallest –l 5 2 92 424 53 42 8 12 23 41 output: The largest number is 424   

./find_largest_smallest –s 5 2 92 424 53 42 8 12 23 41 output: The smallest number is 2

1) Name your program numbers.c.

2) Use atoi function in <stdlib.h> to convert a string to integer form.

3) Generate the executable as find_largest_smallest.

gcc –Wall –o find_largest_smallest numbers.c

Answer 1

int main() {
int a[30], i, num, smallest,largest;
char f;
printf("\nEnter no of elements :");
scanf("%d", &num);
printf("\nEnter elements :\n");
//Read n elements in an array
for (i = 0; i < num; i++)
scanf("%d", &a[i]);

for (i = 0; i < num ; i++){
if (largest < a[i])
largest = a[i];
}
//Consider first element as smallest
smallest = a[0];
for (i = 0; i < num; i++) {
if (a[i] < smallest) {
smallest = a[i];
}
}
printf("Enter 'l' for largest number or 's' for smallest number \n");
scanf("%s",&f);

if(f == 'l')
printf("\nThe Largest number is %d", largest);
else if(f == 's')
printf("\nThe smallest number is %d", smallest);
else
printf("error\n");

return (0);
}

Output: