c++ - How can I compare line from text file to multiple lines following? -


i have text file 1s, 2s , 3s below:

1 1 2 3 3 3 1 2 2 2 2 1

..and trying find way find out how many in row each.

for example if checking 1 output: 1 in row: 2, 2 in row: 1, 3 in row: 0, 4 in row: 0.... way 20 in row (array size), since there 2 1s in row once , 2 1s (only 1 in row)

i trying calculate how many times number 1 1 in row, 2 in row, 3 in row, etc 20 (if had longer list)

so far have, don't know @ ??? line:

int main() {     ifstream file("test.txt");     string linebuffer;     int sequencecounts[20];     int onez = 0;      while (file && getline(file, linebuffer)){         if (linebuffer.length() == 0)continue;         {             if (linebuffer == "1")             {                 ??? while next 1->onez++                 sequencecounts[onez]++;             }         }      }     return 0; }

try along lines of this:

int sequencecounts[20]; int currentones = 0;  while (file && getline(file, linebuffer)){   if (linebuffer.length() == 0){     if (currentones > 0){       sequencecounts[currentones]++;     }     continue;   }    if (linebuffer == "1")   {     currentones++;  //we found 1,     //meaning current group bigger in last line.   } else if (currentones > 0){     //this line not contain "1", previous lines did     sequencecounts[currentones]++;     currentones = 0;   } }

basically each time encounter "1" increase counter how long current sequence is. when sequence finished (a line without "1" "1"s before) increase counter particular number of "1"s , reset counter current sequence.

edit: previous failed if file ended "1"


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