错误字符串和字符 [英] error string and char..

问题描述

#include <iostream>
#include <stdio.h>
using namespace std;
int main()
{
	float c,f;
	printf("plesase write a number of degrees celsius:");
	scanf("%f",&c);
	f=c*9/5+32;
	printf("number of degree fahrenheit: %f\n",f);
	system("pause");
	return 0;
}

输出是数字，输入是数字.
如果输入字符串，则输出不适合，例如，如果输入字符串，则我们cout的输出<<"error";
使用cin和cout是什么?

Output is the number.Its input is the number.
If the input string, the output is not suitable for, say, if the input string, the output of our cout<<"error";
With cin and cout What is it?

推荐答案

尝试以下操作:

Try this:

int main(int argc, char *argv[])
    {
    float c,f;
    printf("plesase write a number of degrees celsius:");
    if (scanf("%f",&c) != 1)
       {
       printf("Error\n");
       }
    else
       {
       f=c*9/5+32;
       printf("number of degree fahrenheit: %f\n",f);
       }
    system("PAUSE");
    return 0;
    }

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