程序不会执行函数，但也不会出错

Question

我编译的代码没有错误，但是通过执行主函数时，它将不会执行函数printt()。我使用（cout >> "Test" >> endl;）来测试它将停止的位置，并且我可以看到printt()内部或者之后发生的任何事情都不会在正在运行的程序中打印。

#include <iostream> 
#include <stdio.h> 

using namespace std; 

class Piece { 

public: 
int ypos, xpos, index; 
string color, kind; 

int getY(void) 
{ 
    return ypos; 
} 

int getX(void) 
{ 
    return xpos; 
} 

int adjustY(int change) 
{ 
    ypos = ypos + change; 
} 

int adjustX(int change) 
{ 
    xpos = xpos + change; 
} 

}; 


Piece p[24]; 

void form(void) 
{ 
for (int i = 0; i <= 23; ++i) 
{ 
    if (i < 4) 
    { 
     p[i].color = "white"; 
     p[i].ypos = 7; 
     p[i].xpos = i * 2; 
     p[i].index = i; 
     p[i].kind = "peon"; 

    } 

    else if (i < 8) 
    { 
     int l; 
     l = i - 4; 
     p[i].color = "white"; 
     p[i].ypos = 6; 
     p[i].xpos = 1 + (l * 2); 
     p[i].index = i; 
     p[i].kind = "peon"; 
    } 

    else if (i < 12) 
    { 
     int m; 
     m = i - 8; 
     p[i].color = "white"; 
     p[i].ypos = 5; 
     p[i].xpos = (m * 2); 
     p[i].index = i; 
     p[i].kind = "peon"; 
    } 

    else if (i < 16) 
    { 
     int n; 
     n = i - 12; 
     p[i].color = "black"; 
     p[i].ypos = 0; 
     p[i].xpos = 1 + (n * 2); 
     p[i].index = i; 
     p[i].kind = "peon"; 
    } 

    else if (i < 20) 
    { 
     int pp; 
     pp = i - 16; 
     p[i].color = "black"; 
     p[i].ypos = 1; 
     p[i].xpos = (pp * 2); 
     p[i].index = i; 
     p[i].kind = "peon"; 
    } 

    else 
    { 
     int q; 
     q = i - 20; 
     p[i].color = "black"; 
     p[i].ypos = 2; 
     p[i].xpos = 1 + (q * 2); 
     p[i].index = i; 
     p[i].kind = "peon"; 
    } 
} 
} 


char matrix[8][8]; 


void printt(void) 
{ 
for (int i = 0; i = 7; ++i) 
{ 
    for (int j = 0; j = 7; ++j) 
    { 
     matrix[i][j] = '_'; 
    } 
} 
for (int c = 0; c <= 23;++c) 
{ 
    int a, b; 
    a = p[c].ypos; 
    b = p[c].xpos; 
    int dec1, dec2; 
    if (p[c].kind == "peon") 
    { 
     dec1 = 1; 
    } 
    else 
    { 
     dec1 = 2; 
    } 
    if (p[c].color == "white") 
    { 
     dec2 = 1; 
    } 
    else 
    { 
     dec2 = 2; 
    } 
    switch(dec1) 
    { 
     case 1: 
      switch(dec2) 
      { 
       case 1: 
        matrix[a][b] = 'o'; 
        break; 

       case 2: 
        matrix[a][b] = 'x'; 
        break; 

      } 
      break; 

     case 2: 
      switch(dec2) 
      { 
       case 1: 
        matrix[a][b] = 'O'; 
        break; 

       case 2: 
        matrix[a][b] = 'X'; 
        break; 
      } 
      break; 
    } 

} 
cout << " 0|1|2|3|4|5|6|7| X Position (column)(j)" << endl; 
cout << endl; 
cout << "0 " << matrix[0][0] << "|" << matrix[0][1] << "|" << matrix[0][2] << "|" << matrix[0][3] << "|" << matrix[0][4] << "|" << matrix[0][5] << "|" << matrix[0][6] << "|" << matrix[0][7] << endl; 
cout << "0 " << matrix[1][0] << "|" << matrix[1][1] << "|" << matrix[1][2] << "|" << matrix[1][3] << "|" << matrix[1][4] << "|" << matrix[1][5] << "|" << matrix[1][6] << "|" << matrix[1][7] << endl; 
cout << "0 " << matrix[2][0] << "|" << matrix[2][1] << "|" << matrix[2][2] << "|" << matrix[2][3] << "|" << matrix[2][4] << "|" << matrix[2][5] << "|" << matrix[2][6] << "|" << matrix[2][7] << endl; 
cout << "0 " << matrix[3][0] << "|" << matrix[3][1] << "|" << matrix[3][2] << "|" << matrix[3][3] << "|" << matrix[3][4] << "|" << matrix[3][5] << "|" << matrix[3][6] << "|" << matrix[3][7] << endl; 
cout << "0 " << matrix[4][0] << "|" << matrix[4][1] << "|" << matrix[4][2] << "|" << matrix[4][3] << "|" << matrix[4][4] << "|" << matrix[4][5] << "|" << matrix[4][6] << "|" << matrix[4][7] << endl; 
cout << "0 " << matrix[5][0] << "|" << matrix[5][1] << "|" << matrix[5][2] << "|" << matrix[5][3] << "|" << matrix[5][4] << "|" << matrix[5][5] << "|" << matrix[5][6] << "|" << matrix[5][7] << endl; 
cout << "0 " << matrix[6][0] << "|" << matrix[6][1] << "|" << matrix[6][2] << "|" << matrix[6][3] << "|" << matrix[6][4] << "|" << matrix[6][5] << "|" << matrix[6][6] << "|" << matrix[6][7] << endl; 
cout << "0 " << matrix[7][0] << "|" << matrix[7][1] << "|" << matrix[7][2] << "|" << matrix[7][3] << "|" << matrix[7][4] << "|" << matrix[7][5] << "|" << matrix[7][6] << "|" << matrix[7][7] << " Y Position (line)(i)" << endl; 
cout << endl; 
} 


int main() 
{ 
cout << "test1" << endl; 
form(); 
cout << "test2" << endl; 
printt(); 
cout << "End of Programm" << endl; 
system ("pause"); 
return 0; 
} 

请帮助我，对不起，如果我正在做一些愚蠢的，对编程来说是新的。

注：（"End of Programm"也未在运行的程序打印）

Answer 1

变化

for (int i = 0; i = 7; ++i) 
{ 
    for (int j = 0; j = 7; ++j) 
    { 
     matrix[i][j] = '_'; 
    } 
} 

到

for (int i = 0; i < 7; ++i) 
{ 
    for (int j = 0; j < 7; ++j) 
    { 
     matrix[i][j] = '_'; 
    } 
} 

创建无限循环

Answer 2

我建议把在编译器的所有警告上。如果你使用g ++，好的标志是“-Wall”。其他编译器应该有类似的选项。

使用此标志进行编译会产生几个警告（包括指向MichałBanasiak指出的循环中的问题的警告）。修复它们将有助于使您的程序正常工作。