Question

我是c新写的，我正在尝试使用switch语句根据输入调用函数。不确定为什么这不起作用。很抱歉，如果这是在错误的地方发布或已经得到解答但我找不到任何内容。

    int choice;

printf("---Menu---\n");

printf("1 Add Two Vectors\n");

printf("2 Subtract Two Vectors\n");

printf("3 Calculate Euclian Distance\n");

printf("4 Exit The Program\n");
printf("  Please select an option (1, 2, 3, or 4): ");
scanf("&d", &choice);

switch (choice){
case 1: 
addVectors();
    break;
case 2: 
subVectors();
    break;
case 3: 
euclianDistance();
    break;

/ *这是被称为* /

的函数

printf("Please input Vector 1 X and Y coordinate separated by a space: ");
    scanf("&d", "&d", &coordinateX1, &coordinateY1);
printf("Please input Vector 2 X and Y coordinate separated by a space: ");
    scanf("&d", "&d", &coordinateX2, &coordinateY2);
vectorSumX = coordinateX1 + coordinateX2;
vectorSumY = coordinateY1 + coordinateY2;
printf("Sum of vectors is: (", &vectorSumX), printf(",", &vectorSumY), printf(")");

return 0;

谢谢！

Answer 1

&vectorSumX

将为您提供变量vectorSumX的地址！您没有使用任何占位符来给出答案！相反，你应该使用

printf("Please input Vector 1 X and Y coordinate separated by a space: ");
scanf("%d,%d", &coordinateX1, &coordinateY1);
printf("Please input Vector 2 X and Y coordinate separated by a space: ");
scanf("%d,%d", &coordinateX2, &coordinateY2);
int vectorSumX = coordinateX1 + coordinateX2;
int vectorSumY = coordinateY1 + coordinateY2;
printf("Sum of vectors is: (");
printf("%d", vectorSumX);
printf(",");printf("%d",vectorSumY);
printf(")");

在功能上得到答案！

使用switch语句调用函数不起作用

1 个答案: