How to find the latest date using linear search?

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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define STRING_LEN 200

int main(){
    FILE * fp1 = fopen("file.csv", "r");
    char string[STRING_LEN], pinFind[STRING_LEN];
    char * pinFound = NULL;
    int day, mo, yr;

    printf("Enter the pin: ");
    scanf("%s", pinFind);

    while(fgets(string, STRING_LEN, fp1)){
      pinFound = strstr(string, pinFind);
      if(pinFound){
        char *p = strrchr(string, ','),tmpstr[STRING_LEN];
        if(sscanf(p + 1, "%u-%u-%4u", &day, &mo, &yr))
        printf("%s", p+1);
      }
    }
    return 0;
}

What I have tried:

In this code, I am trying to find the linear search to find the latest date like the given result is this.

18-10-2020
19-10-2020

but the latest one is the last one. So I just want to print that last one using linear search but don't know how to do it?

Posted 20-Oct-20 7:44am

ibilalkayy

Updated 20-Oct-20 8:22am

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OriginalGriff · Answer 1 · 2020-10-20T08:22:00

Keep a "maximum-so-far" date which you preset to minimum possible date before the loop.
Inside the loop, you check the current line's date against the maximum-so-far, and if it is greater, set the new maximum-so-far.
After the loop, print maximum-so-far.

For positive integers in an array:

C++

int max = -1;
for (int i = 0; i < noOfElements; i++)
   {
   if (arr[i] > max)
      {
      max = arr[i];
      }
   }
printf("%u\n", max);

Try that with an array of values and watch what happenes i the debugger - you'll see what I mean.