Qt实现统计文本出现最高频次的字符

#include <iostream> #include <string> using namespace std; int main() { string str; int i, j, k, t, a[200] = { 0 }, b[200] = { 0 }; cout << "请输入文本：" ; cin >> str; t = str.size(); for (i = 0; i<t; i++) { if (str[i] >= 'a'&& str[i] <= 'z') { a[str[i] - 97 + 26]++; } else if (str[i] >= 'A'&& str[i] <= 'Z') { a[str[i] - 65]++; } else if (str[i] > -127 && str[i]<-96 || str[i]>-86 && str[i] < -2) { a[str[i] + 179]++; i++; } } for (i = 0; i < 200; i++) { b[i] = a[i]; } for (i = 0; i < 200; i++) { for (j = 0; j < 200 - i; j++) { if (b[j] < b[j + 1]) { k = b[j + 1]; b[j + 1] = b[j]; b[j] = k; } } } if (b[0] == 0) { cout << "出现频次最高的是："; cout << "无频次最高的字母或字 "<<endl; cout << "出现频次第二高的是："; cout << "无频次第二高的字母或字 "<<endl; cout << "出现频次第三高的是："; cout << "无频次第三高的字母或字 "<<endl; } if (b[0] > 0) { int x, y; for (i = 0; i < 200; i++) { if (b[i] < b[0]) { x = b[i]; break; } } if (x == 0) { y = 0; } if (x > 0) { for (i = 0; i < 200; i++) { if (b[i] < x) { y = b[i]; break; } } } cout << "出现频次最高的是："; for (i = 0; i < 200; i++) { if (a[i] == b[0] && i >= 26 && i < 52) { cout << (char)(65 + 6 + i) << "共出现" << b[0] << "次" << " "; } if (a[i] == b[0] && i < 26) { cout << (char)(65 + i) << "共出现" << b[0] << "次" << " "; } if (a[i] == b[0] && i >= 52) { for (j = 0; j < t; j++) { if (str[j] + 179 == i) { cout << str[j] << str[j + 1] << "共出现" << b[0] << "次" << " "; j = j + 1; break; } if (str[j] + 179 != i && (str[j] > -127 && str[j]<-96 || str[j]>-86 && str[j] < -2)) { j = j + 1; } } } } cout << endl; cout << "出现频次第二高的是："; for (i = 0; i < 200; i++) { if (a[i] == x && x > 0 && i >= 26 && i < 52) { cout << (char)(65 + 6 + i) << "共出现" << x << "次" << " "; } if (a[i] == x && x > 0 && i < 26) { cout << (char)(65 + i) << "共出现" << x << "次" << " "; } if (a[i] == x && x > 0 && i >= 52) { for (j = 0; j < t; j++) { if (str[j] + 179 == i) { cout << str[j] << str[j + 1] << "共出现" << x << "次" << " "; j = j + 1; break; } if (str[j] + 179 != i && (str[j] > -127 && str[j]<-96 || str[j]>-86 && str[j] < -2)) { j = j + 1; } } } if (x == 0) { cout << "无频次第二高的字母或字 "; break; } } cout << endl; cout << "出现频次第三高的是："; for (i = 0; i < 200; i++) { if (a[i] == y && y > 0 && i >= 26 && i < 52) { cout << (char)(65 + 6 + i) << "共出现" << y << "次" << " "; } if (a[i] == y && y > 0 && i < 26) { cout << (char)(65 + i) << "共出现" << y << "次" << " "; } if (a[i] == y && y > 0 && i >= 52) { for (j = 0; j < t; j++) { if (str[j] + 179 == i) { cout << str[j] << str[j + 1] << "共出现" << y << "次" << " "; j = j + 1; break; } if (str[j] + 179 != i && (str[j] > -127 && str[j]<-96 || str[j]>-86 && str[j] < -2)) { j = j + 1; } } } if (y == 0 || x == 0) { cout << "无频次第三高的字母或字 "; break; } } cout << endl; } return 0; }