统计字符串中各个数字、空白字符以及其他所有字符出现的次数,可以使用以下几种方法:
方法一:使用C语言
```c
include include int main() { int ch, space = 0, other = 0, i; int num = {0}; while ((ch = getchar()) != EOF) { if (isspace(ch)) { space++; } else if (ch >= '0' && ch <= '9') { num[ch - '0']++; } else { other++; } } printf("space = %d\n", space); printf("other = %d\n", other); for (i = 0; i < 10; i++) { if (num[i] > 0) { printf("%d: %d\n", i, num[i]); } } return 0; } ``` 方法二:使用C语言和fgets ```c include include define M 1024 void main() { char str[M]; fgets(str, M, stdin); int space = 0, letter = 0, num = 0, other = 0; for (int i = 0; i < strlen(str); i++) { if (str[i] == ' ') { space++; } else if (str[i] >= '0' && str[i] <= '9') { num++; } else { other++; } } printf("空格的个数为: %d\n", space); printf("英文字母的个数为: %d\n", letter); printf("数字的个数为: %d\n", num); printf("其他字符的个数为: %d\n", other); } ``` 方法三:使用C语言和getchar ```c include void main() { char a, b; int count1 = 0; printf("输入字符串: "); do { a = getchar(); if (a != '\n') { count1++; } } while (a != '\n'); printf("字符总数: %d\n", count1 - 1); } ``` 方法四:使用C语言和正则表达式 ```c include include int main() { char str; printf("输入字符串: "); fgets(str, 1000, stdin); int num = 0; for (int i = 0; str[i] != '\0'; i++) { if (isdigit(str[i])) { num++; } } printf("数字的个数为: %d\n", num); return 0; } ``` 方法五:使用Java ```java import java.util.HashMap; import java.util.Map; import java.util.Scanner; public class StrCount { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("请输入一串字符串:"); String line = sc.nextLine(); Map for (char c : line.toCharArray()) { if (Character.isDigit(c)) { map.put(c, map.getOrDefault(c, 0) + 1); } } for (Map.Entry System.out.println(entry.getKey() + "(" + entry.getValue() + ")"); } } } ``` 方法六:使用Python