简单计算器c++课程设计讲解

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}

{ }

for(j=0;j<=y-2;j++)//加减法 { }

if(abs(a[0])>100000000)

MessageBox(\您输入的数值过大!\else

m_str.Format(\pass1=0; UpdateData(0);

if(b[j]=='+')

a[0]=a[0]+a[j+1]; if(a[j]!=100000000.0) { }

if(b[j]!=' ') { }

b[y]=b[j]; y+=2; a[x]=a[j]; x+=2;

else if(b[j]=='-')

a[0]=a[0]-a[j+1];

7、阶乘的计算

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void CLuxiaoyingDlg::OnJiechengButton28() {

// TODO: Add your control notification handler code here double a,itemp=0,rate=10.0; int i,k;

UpdateData(TRUE);

for(i=0;i

a=1;

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if(isdigit(m_str.GetAt(i))) { }

else if(m_str.GetAt(i)=='.')

rate=0.1; if(rate==10.0) { } else { }

itemp=itemp+rate*(m_str.GetAt(i)-'0'); rate=rate/10;

if(i==m_str.GetLength()-1)

a=itemp;

itemp=itemp*rate+(m_str.GetAt(i)-'0'); if(i==m_str.GetLength()-1)

a=itemp;

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}

else { k=1;

for(i=1;i<=a;i++) }

m_str.Format(\pass1=0;

UpdateData(FALSE);

k*=i; a=k;

8、ln功能的实现

void CLuxiaoyingDlg::OnLnButton21() {

// TODO: Add your control notification handler code here double a,itemp=0,rate=10.0; int i;

UpdateData(TRUE);

for(i=0;i

if(isdigit(m_str.GetAt(i))) {

if(rate==10.0) { } else

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itemp=itemp*rate+(m_str.GetAt(i)-'0'); if(i==m_str.GetLength()-1)

a=itemp;

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}

}

}

{ }

itemp=itemp+rate*(m_str.GetAt(i)-'0'); rate=rate/10;

if(i==m_str.GetLength()-1)

a=itemp;

else if(m_str.GetAt(i)=='.')

rate=0.1;

if(a==0)

MessageBox(\不能取对数!\

else a=log(a);

m_str.Format(\pass1=0;

UpdateData(FALSE);

9、log功能的实现

void CLuxiaoyingDlg::OnLogButton26() {

// TODO: Add your control notification handler code here

double a,itemp=0,rate=10.0;

int i;

UpdateData(TRUE);

for(i=0;i

if(isdigit(m_str.GetAt(i))) {

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