C language: returns the first pointer of the same element in two arrays (I used the loop and goto loop labels), gotoloop

C language: returns the first pointer of the same element in two arrays (I used the loop and goto loop labels), gotoloop

//

// Main. c

// Pointer_search

//

// Created by ma c on 15/8/2.

// Copyright (c) 2015 bjsxt. All rights reserved.

// Requirement: Compare the elements in two ordered arrays by searching the pointer and output the first identical element value in the two arrays.

 

# Include <stdio. h>

Int * searchSameElement (int * a, int * B, int len1, int len2 );

Int main (int argc, const char * argv [])

{

Int a [] = {5, 11, 8, 6, 7, 10 };

Int B [] = {80, 9, 14,8, 14,19, 4 };

 

// The following method for calculating the length of an array is more common in the internal implementation of the function. However, if you pass it as a parameter to an external function, the array name degrades to a pointer, the following method does not apply to calculating the array length.

Int len1 = sizeof (a)/sizeof (a [0]); // calculate the length of array

Int len2 = sizeof (B)/sizeof (B [0]); // calculate the length of array B

Int * pt = searchSameElement (a, B, len1, len2); // returns the first address of the same value.

If (pt)

Printf ("% d \ n", * pt );

Else

Printf ("the same number don not find! \ N ");

Return 0;

}

Int * searchSameElement (int * a, int * B, int len1, int len2)

{

Int * temp = a; // initialize a temporary pointer to prevent temp from becoming a wild pointer.

For (int I = 0; I <len1; I ++)

{

For (int j = 0; j <len2; j ++)

{

If (* (a + I) = * (B + j ))

{

Temp = a + I;

Goto loop;

// This indicates that the first identical element is found, and the return a + I

}

If (j = len2)

{

Break; // indicates that the first number of external loops is not found in the internal loop.

}

}

If (I = (len1-1 ))

{

Temp = 0;

Goto loop;

// This indicates that the internal and external loops do not find the first same element, jump to the end, return 0

}

}

Loop: return temp;

}