C语言中‘Assignment to expression with array type’错误如何解决？字符串矩阵赋值问题

• Error Scenario: You’ll run into this error when trying to directly assign a value from a string matrix (2D char array) to a string variable, like with this line of code:

  last_command = buttonValues[i][j];
  

• Why This Happens: In C, array names act as constant pointers to their first element. You can’t directly assign one array to another—this kind of direct assignment isn’t supported by the compiler, since arrays aren’t treated as single, assignable values.

• The Fix: Use the strcpy() function from the standard library to copy the string instead. Replace the problematic line with:

  strcpy(last_command, buttonValues[i][j]);
  

  Note: Don’t forget to include the <string.h> header at the top of your file, otherwise the compiler won’t recognize the strcpy function.

内容的提问来源于stack exchange，提问作者Glen E. Renner