실행 중 세그먼트 덤프 오류 발생

Question

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


void encrypt(char inputText[20], int inputLength, int key); 
void decrypt(int cipherText[20], int inputLength, int key); 


FILE* fp; 
char* mappingFile; 

int main(int argc, char* argv[]){ 

    char inputText[20],temp; 
    int key,mode,inputLength, cipherText[20],i; 
    if (strcmp(argv[1], "-i")==0){ 
     mappingFile=argv[2]; 
    }else if (strcmp(argv[1],"-k")==0){ 
     key=atoi(argv[2]); 
    }else if (strcmp(argv[1],"-m")==0){ 
     mode = atoi(argv[2]); 
    }else{ 
     printf("invalid argument %s. Please re-run the program\n",argv[1]); 
       exit(EXIT_FAILURE); 
    } 
    if (strcmp(argv[3],"-i")==0){ 
    mappingFile = argv[4]; 
    }else if (strcmp(argv[3],"-k")==0){ 
    key=atoi(argv[4]); 
    }else if (strcmp(argv[3],"-m")==0){ 
    mode = atoi(argv[4]); 
    }else{printf("invalid argument %s. Please re-run the program\n",argv[3]); 
     exit(EXIT_FAILURE); 
    } 
    if (strcmp(argv[5],"-i")==0){ 
     mappingFile=argv[6]; 
    }else if (strcmp(argv[5],"-k")==0){ 
     key=atoi(argv[6]); 
    }else if (strcmp(argv[5],"-m")==0){ 
     mode=atoi(argv[6]); 
    }else{ 
     printf("invalid argument %s. Please re-run the program\n",argv[5]); 
     exit(EXIT_FAILURE); 
    } 
    if (key >25){ 
     printf("You entered %d. Sorry, your key must be between 1 and 25. Re-     run the program and try again\n", key); 
     exit(EXIT_FAILURE); 
    } 
    if (mode !=1 &&mode!=2){ 
     printf("Unidentified mode. Run again!\n"); 
     exit(EXIT_FAILURE); 
    } 
    fp=fopen(mappingFile,"r"); 
    if (fp==NULL){ 
     printf("Cannot open mapping file\n"); 
     exit(EXIT_FAILURE); 
    } 
    if (mode==1){ 
    printf("Enter the word you want to encrypt, upto 20 characters "); 
    scanf("%20s", inputText); 
    inputLength= strlen(inputText); 

    encrypt(inputText, inputLength, key); 
    } 
    if (mode==2){ 
    printf("Enter the encrypted word you want to decrypt, upto 20 soace-  separated numbers. Put any letter at the end of your message "); 
    i = 0; 
    printf("Enter the encrypted word you want to decrypt, upto 20 soace-separated numbers. Put any letter at the end of your message "); 
    i = 0; 
    do{ 
     scanf("%d%c",&cipherText[i],&temp); 
     i++; 
     } while (temp ==' '); 
     } 
     inputLength=i; 
     decrypt(cipherText, inputLength,key); 
     } 

void encrypt(char inputText[20], int inputLength, int key){ 
    int i,a,numb,character; 
    char inputLetter,letter,String[20]; 
    for(a=0;a<=(inputLength-1);a = a+1){ 
     inputLetter = inputText[a]; 
     fopen(mappingFile,"r"); 
     while (fscanf(fp, "%c, %d", &letter, &numb)!=EOF){ 
      if (letter == inputLetter){ 
       String[a]=(numb-key+26); 
       fclose(fp); 
       break; 
      } 
     } 
    } 
    for (i=0;i<(inputLength);i++){ 
     character = String[i]; 
     printf("%d ",character); 
    } 
    printf("\n"); 
} 

void decrypt(int cipherText[20], int inputLength, int key){ 
    int i,a,numb,temp,inputNumber,character; 
    char String[20],letter; 

    for(a=0;a<=(inputLength-1);a = a+1){ 
     inputNumber = cipherText[a]; 
     i = 0; 
     fopen(mappingFile,"r"); 
     temp=(inputNumber+key); 
     if (temp>26){ 
      temp = temp -26; 
     } 
     while (fscanf(fp, "%c, %d", &letter, &numb)!=EOF){ 
      if (numb == temp){ 
       String[a] = letter; 
       fclose(fp); 
       break; 
      }else{ 
       i++; 
      } 
     } 
     } 

     for (i=0;i<(inputLength);i++){ 
      character = String[i]; 
      printf("%c",character); 
     } 
     printf("\n"); 
    } 

매우 간단한 암호화/암호 해독 프로그램입니다. .csv 파일에서 스키마를 읽습니다. 스키마는 입력 키와 쌍을 이루면 암호화 해독 정보를 제공합니다. 작품은 내가 필요로하는 모든 것을 완벽하게 수행하고 예상되는 결과물을 인쇄합니다. 하지만 나중에 세그먼트 분할 오류가 발생하고 이유를 모르겠다.

Answer 1

오류가 발견되었습니다. 시간 내 줘서 고마워!