我想问一下:如何检查用户输入,这是与另一个数组存储在数组中,我已经定义了... 这样的事情:用户将给出输入10,20,5,我需要检查,如果是来自这个数组{5,10,20,50}
任何帮助赞赏:)。感谢
#include <stdio.h>
#include <stdlib.h>
int main ()
{
float bill;
int notes[] = {100, 50, 20, 10, 5, 2, 1, 0.50, 0.20, 0.10, 0.05, 0.02, 0.01};
printf("Enter value of your bill: ");
scanf("%f",&bill);
if (bill<0 || bill>10000)
{
return -1;
}
else
{
for (int i=0; i<8;i++)
{
if (bill!=notes[i])
{
break;
}
}
}
return 0;}
答案 0 :(得分:2)
要获得用户输入,您必须使用scanf()
功能。这是一个例子,它要求三个单独的数字。
#include <stdio.h>
int main(void) {
int one, two, three;
printf("Enter first number: ");
scanf("%d", &one);
printf("Enter second number: ");
scanf("%d", &two);
printf("Enter third number: ");
scanf("%d", &three);
printf("one: %d, two: %d, three: %d\n", one, two, three);
return 0;
}
将产生以下内容:
Enter first number: 1
Enter second number: 2
Enter third number: 3
one: 1, two: 2, three: 3
以下是使用scanf的另一种方法,但用户必须更具体地说明他们如何回答提示。
#include <stdio.h>
int main(void) {
int one, two, three;
printf("Enter three numbers separated by a comma: ");
scanf("%d,%d,%d", &one, &two, &three);
printf("one: %d, two: %d, three: %d\n", one, two, three);
return 0;
}
将产生以下内容:
Enter three numbers separated by a comma: 1,2,3
one: 1, two: 2, three: 3
更新:因为您发布的代码显示了您知道scanf的工作原理。
要搜索数组,必须使用for循环。
#include <stdio.h>
int main(void) {
float n = 100;
int numbers[] = {5, 10, 20, 50, 100, 200, 500};
int i;
for (i = 0; i < 7; i++) {
if (n == numbers[i]) {
printf("Matching index for %f at %d\n", n, i);
}
}
return 0;
}
答案 1 :(得分:0)
#include<stdio.h>
int main(){
int inp,i,j;
int foo=0;
int arr[]={5,10,20,30};
for(j=0;j<3;j++){
scanf("%d",&inp);
for(i=0;i<4;i++)
{
if(inp == arr[i])
{
foo=1;
break;
}
}
if(foo==0)
break;
}
}