074256_5.cpp

一个用c语言写的一个矩阵加减乘的小程序。里面有具体的使用方法

//074256_5.cpp
//To read how many cols and rows in the Matrix

#include"074256_1.h"

void read_cr(int *row,int *col)
{
	int ok_row=0;
	int ok_col=0;

	for(;;)
	{
		printf("\tHow many rows:\n\t");
		ok_row=scanf("%d",row);
		clean();
		printf("\tHow many colums:\n\t");
		ok_col=scanf("%d",col);
		clean();
		printf("\n");
		 
        //judge if the number of rows and colums is reasoniable

		if(!(ok_row&&ok_col))                   //judge if a digit or not
		{
			
			printf("\t-------> Bad Data!\n");
			printf("\t\tPlease input a digit ( an intager ) !\n\n");
		}
		else if((*row<=0)||(*col<=0))                  //judge if positive or not
		{
			printf("\t-------> Bad Data!\n\tThe error data:%d,%d\n",*row,*col);
			printf("\t\tThe number shoud be positive!\n\n");
		}
	    else 
		{
			printf("\t-------->  OK.\trow = %d , col = %d\n\n",*row,*col);
			break;
		}

	} 
	
		 
}