int input; while (valid == 0) { printf("Enter number of faces: "); input = scanf("%d%c", &faces, &c); valid = checkType(input, &c); printf(valid == 0 ? "not valid\n" : "valid\n"); } } scanf()函数族并不是真正用于输入可疑语法的。 解决问题的通常方法是以一种肯定会成功...
在上面的代码里,scanf的返回值可能是0,1,2或者EOF。 对0,1,2进行按位取反得到的都是非零值,此时while循环会继续执行。 在大多数环境里,EOF被定义为值为-1的常量,进行按位取反后得到的值为0.此时while循环将会结束。 综上所述,这个while语句可以不断从输入流读入数据,直到输入流结束,循环也就结束。 值得一...
Hello, I used scanf() in a while loop, which ensures that user input is valid (must be an integer no greater than 21 or less than 3). If user enters a number out of the range, or enters non-number, he/she will be asked to retry. /* start */ int n; wh
Ok I have a while loop here which contains a switch statement (I have only fleshed out case 1) and functions normally , except for when in case 1 I hi
}while(!feof(cfile)); //while(strcmp(target,"quit")!=0)//end loop //print to file fprintf(cfile,"%s", mystring); //close file fclose(cfile); //show user file has been written printf("\nSuccess. File has been written\n"); ...
Application keeps running in the background even after closing. Application Path Base directory application pointing to older version of dll Application settings in dll.config Application.DoEvents() alternative Application.Exit(); not working in the form constructor, why? ApplicationClass can not be em...
scanf() is not designed for production code, but for creating test programs to see if other aspects of the program are working. scanf() will replace the complicated input routines so that other modules can be exercised and perfected. Then the scanf() is replaced with the real input ...
Thus, we should manually flush the input buffer in some other way, but only if the last character read was NOT the ENTER ('\n') and until we find that ENTER and consume it . That's what the code of your instructor does, with that while-loop. In general, scanf() is one of the...
Hi Erich. I am trying to get working with a FRDM22F and want to output to the console. The issues is we do not want to use the KSDK. I have set up a project using the K22F board, not using the KSDF, PE and changed the heap size. The project runs but nothing shows up in ...
Application keeps running in the background even after closing. Application Path Base directory application pointing to older version of dll Application settings in dll.config Application.DoEvents() alternative Application.Exit(); not working in the form constructor, why? ApplicationClass can not be em...