C语言中的textwidth()函数

头文件graphics.h包含textwidth()函数，该函数返回以像素为单位的输入字符串的宽度。
句法 ：

int textwidth(char *string);

例子 ：

输入： 字符串 =“ Hello Geek！祝你有美好的一天。”输出 ：

下面是textwidth()函数。

// C Implementation for textwidth()
#include 
#include 
  
//driver code
int main()
{
    // gm is Graphics mode which is
    // a computer display mode that
    // generates image using pixels.
    // DETECT is a macro defined in
    // "graphics.h" header file
    int gd = DETECT, gm, color, width;
    char arr[100];
  
    // initgraph initializes the
    // graphics system by loading a
    // graphics driver from disk
    initgraph(&gd, &gm, "");
  
    // textwidth function
    width = textwidth("Hello Geek ! Have a good day.");
  
    //sprintf stands for “String print”.
    //Instead of printing on console,
    //it store output on char buffer
    //which are specified in sprintf
    sprintf(arr, "Textwidth is = %d", width);
  
    //outtext function displays text
    //at current position.
    outtext(arr);
  
    getch();
  
    // closegraph function closes the
    // graphics mode and deallocates
    // all memory allocated by
    // graphics system .
    closegraph();
  
    return 0;
}

输出 ：

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