无效的类型' double [100] [double]'用于数组下标 [英] Invalid types 'double [100][double]' for array subscript

问题描述

#define MAX 100 
double velocity[MAX];
for (itr = 0; itr < velocity[0]; itr = itr + 1)
    {
        velocity[itr] = velocity[0] - (1*itr);
        distance[itr] = rk4_solve(itr, velocity);
        cout << setw(5) << itr << setw(9) << velocity[itr] << setprecision(4) << setw(10) << distance[itr] << endl;
    }

我正在尝试将值输入到数组中，但是由于某种原因，我收到了错误消息:for循环中3行的数组下标无效类型'double [100] [double]'.

I am trying to input values into the array but for some reason I get the error: i Invalid types 'double [100][double]' for array subscript for the 3 lines inside the for loop.

推荐答案

itr 必须是 int (或其他整数类型)

itr must be an int (or other integer type)

请注意，您在for循环中将 itr 与 velocity [0] 进行比较( itr< velocity [0]; ).您可能是说 itr<MAX ，我希望您在某处定义了变量 itr

Be aware that you are comparing itr with velocity[0] in the for cycle (itr < velocity[0];). You probably meant itr < MAX, and I hope somewhere you defined the variable itr

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