我正在尝试读取文件并打印文件中的所有单词,忽略所有其他空格和符号。我让它使用strcpy,但它给了我一个错误,我试图使用sprintf,但我真的不明白这个功能词是怎么回事。它打印随机整数而不是字符串。
编辑:我对C来说是全新的,所以我的指针不太好。
FILE *file;
file = fopen("sample_dict.txt", "r");
int c;
int wordcount = 0;
int count = 0;
const char *a[10];
char word[100];
do {
c = fgetc(file);
//error statement
if (feof(file)) {
break;
}
if (isalpha(c) && count == 2) {
printf("%s\n", word);
memset(word, 0, sizeof(word));
count = 1;
wordcount++;
}
if (isalpha(c)) {
//strcat(word, &c);
sprintf(word, "%d", c);
continue;
}
count = 2;
continue;
} while (1);
fclose(file);
return (0);
return 0;
答案 0 :(得分:1)
如果需要该字符,请在C中使用%c作为格式说明符。如果使用%d,它将起作用,但会显示为整数 另一件事是,如果你想使用sprintf将字符串与char或int连接起来,你必须在sprintf的参数列表中包含两者:
改变这个:
sprintf(word, "%d", c);
对此:
char newString[20];//adjust length as necessary
sprintf(newString, "%s%c",word, c);
你的逻辑表明你只想附加char,如果它是alpha [a-z,A-Z]
if(isalpha(c))
{
//strcat(word, &c);
sprintf(word, "%d", c);
continue;
}
将其更改为:
if(isalpha(c))
{
//strcat(word, &c);
char newString[20];//bigger if needed, 20 just for illustration here
sprintf(newString, "%s%d", word, c);
continue;
}
答案 1 :(得分:0)
#define IN 1
#define OUT 0
FILE *file;
file = fopen("sample_dict.txt","r");
int c;
int wordcount = 0;
int status = OUT;//int count = 0;
//const char *a[10];//unused
char word[100] = "";
do {
c = fgetc(file);
if(feof(file)){
if(*word){//*word : word[0] != '\0'
printf("%s\n", word);
}
break;
}
if(isalpha(c)){
char onechar_string[2] = {0};//{c};
onechar_string[0] = c;
strcat(word, onechar_string);
if(status == OUT){
wordcount++;
}
status = IN;
} else {
if(status == IN){
printf("%s\n", word);
*word = 0;//memset(word,0,sizeof(word));
}
status = OUT;
}
}while(1);
fclose(file);