编译原理课程设计说明书(4)

char style = ' '; //初始状态为整数 string word = null;

word += Convert.ToString(program[i]); if (i < program.Length - 1) {

i++; location++;

while (isornotnum(program[i]) | program[i] == '.' ) {

location++;

if(program[i]=='.') {

style='.'; }

word += Convert.ToString(program[i]); if (i < program.Length - 1) i++; else {

i++; break; } } } else {

//im[j].style = 3; im[j].style = 1; }

if (style == ' ')//整数 {

int num = Convert.ToInt32(word); im[j].word = num.ToString();

}

else //小数

{//location对应点的位置 //确定location的位置 int n ;

for (n = 0; n < word.Length; n++)

9

山东科技大学学生课程设计

{

if (word[n] == '.') location = n; }

string left = null; string right = \ int m;//用于循环

for (m = 0; m < word.Length; m++) {

if (m < location) left += word[m]; else right += word[m]; }

im[j].word += Convert.ToString('.'); im[j].word += Convert.ToInt16(left); im[j].word += Convert.ToDouble(right);

}

//im[j].style = 3; im[j].style = 1; j++; }

/**********************运算符*********************/

else if (program[i] == '>' || program[i] == '<' || program[i] == '!'

|| program[i] == '=')

{

if (i < program.Length - 1)//存在i+1 {

if (program[i + 1] == '=') {

if (j == 0) {

im[0].word = program[i] + \ im[0].style = 4; i += 2; j++; } else {

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山东科技大学学生课程设计

j++;

im[j].word = program[i] + \ im[j].style = 4; j++; i += 2; } } else {

if (j == 0) {

im[0].word = program[i]; im[0].style = 4; i++; j++; } else {

j++;

im[j].word = program[i]; im[j].style = 4; j++; i++; } } } else {

if (j == 0) {

im[0].word = program[i]; im[0].style = 4; i++; j++; } else {

j++;

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