一、技术总结
- 具体参看代码
- 参看sscanf和sprintf的解释,https://www.cnblogs.com/tsruixi/p/12933677.html
二、参考代码
#include<bits/stdc++.h>
using namespace std;
int main(){
int N, cnt = 0;
double sum = 0.0, temp;
scanf("%d", &N);
char a[50], b[50];
for(int i = 0; i < N; i++){
scanf("%s", a);
sscanf(a, "%lf", &temp);
sprintf(b, "%.2f", temp);
int flag = 0;
for(int j = 0; j < strlen(a); j++){
if(a[j] != b[j]) flag = 1;
}
if(flag || temp < -1000 || temp > 1000){
printf("ERROR: %s is not a legal number
", a);
continue;
}else{
sum += temp;
cnt++;
}
}
if(cnt == 1){
printf("The average of 1 number is %.2f", sum);
}else if(cnt > 1){
printf("The average of %d numbers is %.2f", cnt, sum / cnt);
}else{
printf("The average of 0 numbers is Undefined");
}
return 0;
}