程序找到数组的第二大元素(Program to find the second largest element of an array)
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2023-12-01
查找数组中的第二大值是经典的C数组程序。 该程序使您可以深入了解迭代,数组和条件运算符。 我们迭代检查每个元素以确定最大和第二大元素。
算法 (Algorithm)
让我们首先看看该程序的逐步程序应该是什么 -
START
Step 1 → Take an array A and define its values
Step 2 → Declare largest and second as integer
Step 3 → Assign first two values of array A to largest and second
Step 4 → Assign the large value to largest and second largest to second
Step 5 → Iterate for Array A
Step 6 → If A[n] > largest, Assign largest.value to second and Assign A[n] to largest
Step 7 → Else If A[n] > second, Assign A[n] to second
Step 8 → Loop Terminates
Step 9 → Display largest and second
STOP
伪代码 (Pseudocode)
现在让我们看看这个算法的伪代码 -
procedure largest_array(A)
Declare largest and second as integer
IF A[0] is greater than A[1] THEN
largest ← A[0]
second ← A[1]
ELSE
largest ← A[1]
second ← A[0]
ENDIF
FOR EACH value in A DO
IF A[n] is greater than largest THEN
second ← largest
largest ← A[n]
ELSE IF second is less than A[n] THEN
second ← A[n]
END IF
END FOR
Display largest and second
end procedure
实现 (Implementation)
这个伪代码现在可以在C程序中实现如下 -
#include <stdio.h>
int main() {
int array[10] = {101, 11, 3, 4, 50, 69, 7, 8, 9, 0};
int loop, largest, second;
if(array[0] > array[1]) {
largest = array[0];
second = array[1];
} else {
largest = array[1];
second = array[0];
}
for(loop = 2; loop < 10; loop++) {
if( largest < array[loop] ) {
second = largest;
largest = array[loop];
} else if( second < array[loop] ) {
second = array[loop];
}
}
printf("Largest - %d \nSecond - %d \n", largest, second);
return 0;
}
输出应该是这样的 -
Largest - 101
Second - 69