Program:

#include <stdio.h>

int main() {

int a[10];

int i;

int greatest;

printf("Enter ten values:");

//Store 10 numbers in an array

for (i = 0; i < 10; i++) {

scanf("%d", &a[i]);

}

//Assume that a[0] is greatest

greatest = a[0];

for (i = 0; i < 10; i++) {

if (a[i] > greatest) {

greatest = a[i];

}

}

printf("\nGreatest of ten numbers is %d", greatest);

return 0;

}

Output:

Enter ten values: 2 53 65 3 88 8 14 5 77 64 Greatest of ten numbers is 88

Explanation with example:

Entered values are 2, 53, 65, 3, 88, 8, 14, 5, 77, 64

They are stored in an array of size 10. let a[] be an array holding these values.

/* how the greatest among ten numbers is found */

Let us consider a variable 'greatest'. At the beginning of the loop, variable 'greatest' is assigned with the value of first element in the array greatest=a[0]. Here variable 'greatest' is assigned 2 as a[0]=2. Below loop is executed until end of the array 'a[]';.

for(i=0; i<10; i++)

{

if(a[i]>greatest)

{

greatest= a[i];

}

}

For each value of 'i', value of a[i] is compared with value of variable 'greatest'. If any value greater than the value of 'greatest' is encountered, it would be replaced by a[i]. After completion of 'for' loop, the value of variable 'greatest' holds the greatest number in the array. In this case 88 is the greatest of all the numbers.