主{}括号上的语法错误,"期望的时间"？

Question

我完全难过了.无论我做什么,我的编译器都认为我需要在上一次printf中使用while循环？它只是一直在寻找没有意义的事情.当我将它们添加到其中时只是告诉我它不应该存在,当我删除它时我被告知我需要它.

int main() {
float userInput; //The grades that the user inputs.
int passingGrade = 0; //Number of passing grades
int failingGrade = 0; //Failing grades
int invalidGrade = 0; //Invalid grades

//This do for loop is simply counting the number of grades of each catagory posted.
do {
    printf("Enter a grade (Enter -1 to quit):");
    scanf("%f", &userInput);
    printf("You entered: %.1f\n", userInput);
    if ((userInput > 100) || (userInput < 0)) { //Over 100 is impossible.
        invalidGrade = invalidGrade + 1;
        printf("You input an impossible grade!\n");
    }
    else {
        if (userInput > 70) { //Greater than 70 means passing.
            passingGrade = passingGrade + 1;
        }
        else {
            if ((userInput < 70) && !(userInput < 0)) {
                failingGrade = failingGrade + 1;
            }
        }
    }
    while (userInput != -1);
}
    printf("You entered %i passing grades.\n", passingGrade);
    printf("You entered %i failing grades.\n", failingGrade);
    printf("You entered %i invalid grades.\n", invalidGrade);
    system("pause"); }

代码运行得很好,并且做了我期望它做的一切.但编译器似乎认为它有问题.

Answer 1

你的while循环在do语句中.如果你在做

do while

它应该是这样的:

do {

} while (...);