四则运算计算器



可以计算整数四则运算，例如：7+5*(3+4)

(1)按要求在提供的框架程序源程序的基础上对程序进行修改、补充，并调试通过。

(2)修改主程序结构，使程序可以反复运算，直到选择退出为止。

(3)增加文件的输入输出功能，是计算过的式子和结果可以根据需要设置命令存储到文件中，同时也可以直接从文件中输入四则运算的式子，运算后，结果输出到原文件中。-Arithmetic calculator can calculate the integer arithmetic, for example: 7+5* (3+4) (1) provides the framework required procedures in the source program based on the modified, supplemented, and debugging through. (2) modify the main program structure, making the program operation can be repeated until the opt-out so far. (3) increase the file input and output functions, the formula is calculated and the results can set the command to a file, but also can directly input from the file of the formula arithmetic, computation, the results are output to the original file in.