C++ 概述
VC++的编程基础虽然简单，但却是MFC或MS VC++面向对象的基础，非常重要
vc++6.0的代码编辑模式怎么改？ 答案：按下键盘上的Insert键。
一个简单的C++程序
#include
void main()
{
int i;
cout<<“please insert the value of i”<<‘\n’; cin>>i;
cout<<“您输入的i的数值为”<<i<<‘\n’;
}
#include #include
if判断语句
void main()
{
int a;
int s=0;
cout<<“Please insert the value of a”<<“\n”; cin>>a;
if(a>0)
s=100;
cout<<“the value a you have input is:”<<a<<‘\n’;
cout<<“the value s is:”<<s<<‘\n’;
}
判断语句
#include <math.h>
#include <iostream.h>
void main()
{
int a,b,c;
cout<<“Please type in the value of a,b,c”<<‘\n’;
cin>>a>>b>>c;
cout<<“a=”<<a<<‘\n'<<“b=”<<b<<‘\t'<<“c=”<<c<<‘\n’;
if(a>=b&&a>=c)
{
cout<<“the max is a and the value is “<<a<<‘\n’;
}else
if(b>=a&&b>=c)
cout<<“the max is b and the value is “<<b<<‘\n’;
else
cout<<“the max is c and the value is “<<c<<‘\n’;
}
实现计算器
#include<iostream.h>
void main(void)
{
float num1,num2;
char op;
cout<<“please input the data,the format is num1 operator num2\n”;
cin>>num1>>op>>num2;
switch(op)
{
case ‘+’: cout<<num1<<op<<num2<<“=”<<num1+num2<<‘\n’;
break;
case ‘-‘: cout<<num1<<op<<num2<<“=”<<num1-num2<<‘\n’;
break;
case ‘*’: cout<<num1<<op<<num2<<“=”<<num1*num2<<‘\n’;
break;
case ‘/’: cout<<num1<<op<<num2<<“=”<<num1/num2<<‘\n’;
break;
}
}
一维数组
#include<iostream.h>
void main(void)
{
float x[5],sum=0;
cout<<“please input 5 number:”;
for(int i=0;i<5;i++)
{
cin>>x[i];
};
for(int j=0;j<5;j++)
{
cout<<“您输入的第”<<j<<“个数值为”<<x[j]<<‘\n’;
sum+=x[j];
};
cout<<“the sum of the number you have input is:”<<sum<<‘\n’;
}
二维数组，矩阵行列互换（转置）
#include<iostream.h>
void main(void)
{
int a[4][4]={{11,12,13,14},{15,16,17,18},{19,20,21,22},{23,24,25,26}};
int t,i,j;
cout<<“the data array you have input are: \n”;
cout<<‘\n'<<‘\n’;
for(i=0;i<4;i++){
for(j=0;j<4;j++)
{
cout<<a[i][j]<<‘\t’;
}
cout<<‘\n'<<‘\n'<<‘\n’;
}
for(i=0;i<4;i++)
for(j=i;j<4;j++)
{
t=a[i][j];a[i][j]=a[j][i];a[j][i]=t;
};
cout<<“the data array after change are:”<<‘\n’;
cout<<‘\n'<<‘\n’;
for(i=0;i<4;i++){
for(j=0;j<4;j++)
{
cout<<a[i][j]<<‘\t’;
}
cout<<‘\n'<<‘\n'<<‘\n’;
}
}