PAT 1054
网上看到的，很好的应用了这两个函数。
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#include <bits/stdc++.h>using namespace std;int main() { int n, cnt = 0; char a[50], b[50]; double temp, sum = 0.0; cin >> n; for(int i = 0; i < n; i++) { scanf("%s", a); sscanf(a, "%lf", &temp); //从一个字符串中读进与指定格式相符的数据 sprintf(b, "%.2lf",temp); //字符串格式化命令，主要功能是把格式化的数据写入某个字符串中 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 %.2lf", sum); } else if(cnt > 1) { printf("The average of %d numbers is %.2lf", cnt, sum / cnt); } else { printf("The average of 0 numbers is Undefined"); } return 0;} |