檢查字符數組 - 每次返回相同的答案

Question

所以我一直在爲一個任務編寫程序 - 我應該創建一個程序，要求提供多少個問題，正確的答案以及提供給測試評分的答案。在我寫的程序中，我總是得到相同的得分值：4199676

有誰能告訴我爲什麼我得到這個返回值嗎？非常感謝。

int main(){ 
int qnum = 1; 
int counter; 
int corr_counter; 
char correct[10000]; 
char answer[10000]; 
while(qnum != 0){ 
    cout<<"Enter the number of questions on the test (0 to exit).\n"; 
    cin>>qnum; 
    while(qnum < 0){ 
     cout<<"Please enter a valid number of questions.\n"; 
     cin>>qnum; 
    } 
    for(counter = 0; counter < qnum; counter++){ 
     cout<<"Enter the correct answer for question "<<counter<<". The answer can be A, B, C, D, or E.\n"; 
     cin>>correct[counter]; 
     toupper(correct[counter]); 
     while(correct[counter] != 'A' && correct[counter] != 'B' && correct[counter] != 'C' && correct[counter] != 'D' && correct[counter] != 'E'){ 
      cout<<"Please enter either A, B, C, D, or E.\n"; 
      cin>>correct[counter]; 
      toupper(correct[counter]); 
     } 
    } 
    for(counter = 0; counter < qnum; counter++){ 
     cout<<"Enter the student's answer for question "<<counter<<". The answer can be A, B, C, D, or E.\n"; 
     cin>>answer[counter]; 
     toupper(answer[counter]); 
     while(answer[counter] != 'A' && answer[counter] != 'B' && answer[counter] != 'C' && answer[counter] != 'D' && answer[counter] != 'E'){ 
      cout<<"Please enter either A, B, C, D, or E.\n"; 
      cin>>answer[counter]; 
      toupper(answer[counter]); 
     } 
    } 
    for(counter = 0; counter < qnum; counter++){ 
     if(answer[counter] == correct[counter]){ 
      corr_counter++; 
     } 
    } 
    cout<<"Score: "<<corr_counter<<"\n"; 
    return(0); 
} 

}

Answer 1

您還沒有初始化corr_counter。

你聲明它在頂部，但你從來沒有將它初始化爲0，這是你的意思。你因此從一個未知的起點增加。