傳遞參數1使得整型指針沒有轉換

Question

int main (int argc, const char * argv[]) { 
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; 

    NSDictionary * ProbablyInaccurateFinnishtoEnglshtranslation= [NSDictionary dictionaryWithObjectsAndKeys: @"postilaatikko", @"mailbox", @"oppikirja", @"textbook", @"näppäimistö", @"keyboard", @"piano", @"piano", @"laskukone", @"calculator", @"manteli", @"almond", @"lumi", @"snow", @"vuori", @"mountain", @"aika", @"time", @"kynttilä", @"candle", nil]; 
    NSString * inputSentence; 
    char cstring[451]; 
    NSArray * sentenceIntoWords; 
    NSMutableString * translatedSentence; 
    int i = 0; 

    NSLog(@"Enter a sentence: \n"); 
    //scanf("%s", &cstring); 
    gets (cstring); 

    inputSentence = [NSString stringWithCString: cstring encoding: NSASCIIStringEncoding]; 

    sentenceIntoWords = [inputSentence componentsSeparatedByString: @" "]; 

    for(i=0; i<[sentenceIntoWords count]; i++) 
    { 
     if ([ProbablyInaccurateFinnishtoEnglshtranslation objectForKey:[sentenceIntoWords objectAtIndex:i] == nil]) 
     { 
      translatedSentence = [NSMutableString stringWithString: [sentenceIntoWords objectAtIndex: i]]; 

     } 
     else { 
      translatedSentence= [ProbablyInaccurateFinnishtoEnglshtranslation objectForKey: [sentenceIntoWords objectAtIndex: i]]; 
     } 
    } 


    NSLog(@"%@", translatedSentence); 
    [pool drain]; 
    return 0; 
} 

我想要做的是將用戶輸入的句子的每個單詞與NSArray進行比較，匹配時用翻譯的單詞替換關鍵字。好的，我已將它更改爲： if（[ProbablyInaccurateFinnishtoEnglshtranslation objectForKey：[sentenceIntoWords objectAtIndex：i]]） { translatedSentence = [ProbablyInaccurateFinnishtoEnglshtranslation objectForKey：[sentenceIntoWords objectAtIndex：i]];

} 
    else { 
     translatedSentence = [NSMutableString stringWithString: [sentenceIntoWords objectAtIndex: i]]; 
      } 

現在只有輸入句子的最後一個字出現了，我的邏輯中是否有錯誤？

Answer 1

支架位於錯誤的地方。你想這樣的：

if ([ProbablyInaccurateFinnishtoEnglshtranslation objectForKey:[sentenceIntoWords objectAtIndex:i]] == nil) 

你現在有什麼是大致相同的：

BOOL isNil = [sentenceIntoWords objectAtIndex:i]] == nil; 
if ([ProbablyInaccurateFinnishtoEnglshtranslation objectForKey:isNil) 

顯然這是錯誤的，因爲objectForKey是（最有可能）預期的對象的指針，而不是一個布爾值。

Answer 2

您不能使用objectForKey:的原始類型。

if ([ProbablyInaccurateFinnishtoEnglshtranslation objectForKey:[sentenceIntoWords objectAtIndex:i] == nil]) 

[sentenceIntoWords objectAtIndex:i] == nil行會給你布爾輸出

所以這是錯誤的if ([ProbablyInaccurateFinnishtoEnglshtranslation objectForKey:boolean_value(yes/NO))

你應該做的就像是在我的計劃顯示這個

if ([ProbablyInaccurateFinnishtoEnglshtranslation objectForKey:[sentenceIntoWords objectAtIndex:i]] == nil) 

Answer 3

類似的錯誤，iepassing 'strlen'的參數1使得整型指針沒有轉換

//編程讀取fasta序列並隨機化它！

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

int main(int ac,char *av[]) 
{ 
    int i; 
    int l1; 
    FILE *file1; 

    if (ac < 2) return 0; 
    file1= fopen(av[1] , "r"); //"r" is a string and 'r' is a character 
    char x; 
    while(((x=fgetc(file1))!= EOF) && (x!='\n')); //skip the header part 
    while(((x=fgetc(file1))!= EOF) && (x!='>')) 
    { 
     if(isalpha(x))        //reading all the alphabets after this(>) sign 

     { 
     printf("%c",x); 

     } 
    } 

//To calculate the length of sequence 

    l1=strlen(x); 
    printf ("The sequence is %d characters long.\n",l1); 

    //to Randomize all the characters present in a string(FASTA sequence) 
    srand(time(NULL)); 

    for (i=l1-1;i>0;i--) 
    { 
    char j = rand() % (i+1); 
    char temp = j; 
    j = x; 
    x = temp; 

    } 
    fclose(file1); 
    return 0; 
}