用C語言編程實現壹個簡單的四則運算計算器

//函數，讀數操作數

int getNextNum()

{

int ret;

scanf("%d",&ret);

return ret;

}

//函數，讀運算符

char getOpt()

{

return getchar();

}

//函數，計算

int caculate(int op1 , int op2 ,char opt)

{

if(opt=='+')return op1+op2;

if(opt=='-')return op1-op2;

if(opt=='*')return op1*op2;

if(opt=='/')return op1/op2;

return 0;

}

int main()

{

int op1,op2;

char opt;

//計算結果放在第壹個操作數

op1 = getNextNum();

while(1)

{

opt = getOpt();

if ( opt == '=' ) break;

op2 = getNextNum();

op1 = caculate(op1,op2,opt);

}

printf("%d\n",op1);

}

return 0;

}