C語言 getc()用法及代碼示例

C 中的 getc() 函數

原型：

    int getc(FILE *filename);

參數：

    FILE *filename

返回類型：整型

函數的使用：

在文件處理中，我們通過 getc() 函數從輸入文件流中取出下一個字符並遞增文件位置指針。函數 getc() 的原型為：

    int getc(FILE *filename);

它返回一個整數值，它是一個unsigned char.它也返回EOF它本身也是一個整數值。每當有二進製文件時，檢查EOF與函數feof()。

C 中的 getc() 示例

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

int main()
{
    //Initialize the file pointer
    FILE* f;
    char ch;
    //Create the file for write operation
    f = fopen("includehelp.txt", "w");
    printf("Enter five character\n");
    for (int i = 0; i < 5; i++) {
        //take the characters from the users
        scanf("%c", &ch);
        //write back to the file
        putc(ch, f);
        //clear the stdin stream buffer
        fflush(stdin);
    }
    //close the file after write operation is over
    fclose(f);
    //open a file
    f = fopen("includehelp.txt", "r");
    printf("Write operation is over and file is ready for read operation\n");
    printf("\n...............print the characters..............\n\n");
    while (!feof(f)) {
        //takes the characters in the character array
        ch = getc(f);
        //and print the characters
        printf("%c\n", ch);
    }
    fclose(f);

    return 0;
}

輸出

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