c语言输入一个字符串 把字符串的正整数取出 保存在数组里打印

以下是一个示例程序，输入一个字符串，将其中的正整数取出并保存在数组中，最后打印出来：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#define MAX_STR_LEN 100

int main() {
    char str[MAX_STR_LEN];
    int nums[MAX_STR_LEN];
    int num_count = 0, i, j;

    printf("Please enter a string:\n");
    fgets(str, MAX_STR_LEN, stdin);

    // Iterate through the string
    for (i = 0; i < strlen(str); i++) {
        // If current character is a digit
        if (isdigit(str[i])) {
            // Keep going until a non-digit is found
            int num = 0;
            while (isdigit(str[i])) {
                num = num * 10 + (str[i] - '0');
                i++;
            }
            // Save the number in the array
            nums[num_count] = num;
            num_count++;
        }
    }

    // Print out the numbers found
    printf("The positive integers found in the string are:\n");
    for (j = 0; j < num_count; j++) {
        printf("%d ", nums[j]);
    }
    printf("\n");

    return 0;
}

示例输出：

Please enter a string:
abc12 def34 jkl56 78mno
The positive integers found in the string are:
12 34 56 78