@ Clear drop pass array to function

One-dimensional arrays

3 Principles for passing an array to a function

1. The function call simply passes the array name.

2. In a function definition, the type of the formal parameter must be the same as the array, and the size of the array does not have to be specified.

3. A function prototype must be defined as an array of parameters.

1#include <stdio.h>2#include <stdlib.h>3 voidSortintX[],intm);4 intMain ()5 {6inti;7intmarks[5] = { +, -, the,Bayi, *};8      9printf"Marks before sorting\n");Ten for(i =0; I <5; i++) Oneprintf"%d", Marks[i]); Aprintf"\ n"); -       -Sort (marks,5); theprintf"Marks after sorting\n"); - for(i =0; I <5; i++) -printf"%d", Marks[i]); -printf"\ n"); +       -System"Pause"); + } A   at voidSortintX[],intm) - { -intI, J, T; -        - for(i =1; I <= m1; i++) -  for(j =1; J <= M-i; J + +) inif(x[j-1] >=X[j]) -            { tot = x[j-1]; +x[j-1] =x [j]; -X[J] =T; the            } *}

Two-dimensional arrays

1. The function call simply passes the array name.

2. In a function definition, you must use two square brackets to indicate that the array is two-dimensional.

3. The size of the second dimension of the array must be specified.

4. The function prototype must be defined in the same way as the function header.

//method One, the formal parameter gives the length of the second dimension. //For example:#include<stdio.h>voidFuncintNCharstr[[5] ){inti; for(i =0; I < n; i++) printf ("\nstr[%d] =%s\n", I, Str[i]);}voidMain () {Char* p[3];Charstr[][5] = {"ABC","def","Ghi"};func (3, str);}//method Two, the formal parameter is declared as a pointer to an array. //For example:#include<stdio.h>voidFuncintNChar(*STR) [5] ){inti; for(i =0; I < n; i++) printf ("\nstr[%d] =%s\n", I, Str[i]);}voidMain () {Char* p[3];Charstr[][5] = {"ABC","def","Ghi"};func (3, str);}//method Three, the formal parameter is declared as a pointer to the pointer. //For example:#include<stdio.h>voidFuncintNChar**str) {inti; for(i =0; I < n; i++) printf ("\nstr[%d] =%s\n", I, Str[i]);}voidMain () {Char* p[3];Charstr[][5] = {"ABC","def","Ghi"};p [0] = &str[0][0];p [1] = str[1];p [2] = str[2]; Func (3, p);}

Passing a string to a function

1. The string to be passed must be declared as the formal parameter of the function at the time of definition. For example:

void display (char item_name[])

{

......

}

2. The function prototype must be able to indicate that the parameter is a string. For the above function definition, its prototype can be written:

void display (char str[]);

3. The function call must take a string array name without subscript as the fact argument. For example:

Display (name);

Where name is an array of strings that have been correctly declared in the calling function.

In the C language, like arrays, a string cannot be passed to a function by value.

@ Clear drop pass array to function