简单编程练习
Posted biaobiao88
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#include<bits/stdc++.h> using namespace std; int main() { srand((unsigned)time(NULL)); for(int i = 0;i < 10;i++) { int n = 0 + rand() % 101; int m = 0 + rand() % 101; int t = 0 + rand() % 2; cout << n; if(t) cout << "+"; else cout << "-"; cout << m << endl; } return 0; }
#include<bits/stdc++.h> using namespace std; int main() { srand((unsigned)time(NULL)); for(int i = 0;i < 10;i++) { int sum,tt,kk; int n = 0 + rand() % 101; int m = 0 + rand() % 101; int p = 0 + rand() % 101; int t = 0 + rand() % 2; int k = 0 + rand() % 2; cout << n; if(t) { cout << "+"; tt = 1; } else { cout << "-"; tt = 0; } cout << m; if(tt == 1) sum = n + m; else sum = n - m; if(k) { cout << "+"; kk = 1; } else { cout << "-"; kk = 0; } cout << p << "="; if(kk == 1) sum += p; else sum -= p; cout << sum << endl; } return 0; }
利用stringstream
添加头文件 #include<sstream>
数字转字符串
#include <string>
#include <sstream>
int main(){
double a = 123.32;
string res;
stringstream ss; 定义流ss
ss << a; 将数字a转化成流ss
ss >> res; 将流ss转化成字符串
return 0;
}
字符串转数字
#include <string>
#include <sstream>
int main(){
double a ;
string res= "123.32";
stringstream ss;
ss << res;
ss >> a;
return 0;
}
资源地址:https://www.cnblogs.com/houchen/p/8984164.html
以下的代码可以实现如若出现重复的随机数,如出现两个55+5-5=50,则可以筛选出来一个,只保留输出一个
#include<bits/stdc++.h> using namespace std; string str1[11],str2[11]; void add() { srand((unsigned)time(NULL)); for(int i = 0;i < 10;i++) { int sum,tt,kk; int n = 0 + rand() % 101; int m = 0 + rand() % 101; int p = 0 + rand() % 101; int t = 0 + rand() % 2; int k = 0 + rand() % 2; string nnn; stringstream nnn1; nnn1 << n; nnn1 >> nnn; str1[i] = str1[i].append(nnn); // cout << str1[i] << "PPP" << endl; // cout << n; if(t) { // cout << "+"; tt = 1; str1[i] = str1[i].append("+"); // cout << str1[i] << "PPP" << endl; } else { // cout << "-"; tt = 0; str1[i] = str1[i].append("-"); } string mmm; stringstream mmm1; mmm1 << m; mmm1 >> mmm; str1[i] = str1[i].append(mmm); // cout << m; if(tt == 1) sum = n + m; else sum = n - m; if(k) { str1[i] = str1[i].append("+"); // cout << "+"; kk = 1; } else { str1[i] = str1[i].append("-"); // cout << "-"; kk = 0; } string ppp; stringstream ppp1; ppp1 << p; ppp1 >> ppp; str1[i] = str1[i].append(ppp); str1[i] = str1[i].append("="); // cout << p << "="; if(kk == 1) sum += p; else sum -= p; string summm; stringstream summm1; summm1 << sum; summm1 >> summm; str1[i] = str1[i].append(summm); // cout << sum << endl; // cout << str1[i] << "LLLLLLLLL" << endl; } //前面不输出,在这里输出。 //在这里遍历是否有重复出现的。 int flag = 0; for(int i = 0;i < 10;i++) { for(int j = i + 1;j < 10;j++) { if(str1[i] == str1[j]) { flag = 1; break; } } if(flag == 1) { flag = 0; continue; } else cout << str1[i] << endl; } } int main() { add(); return 0; }
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