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View Compilation Error

0_0_16821497_10453.cpp:67:8: error: redefinition of 'struct matrix'
 struct matrix
        ^
0_0_16821497_10453.cpp:8:8: error: previous definition of 'struct matrix'
 struct matrix
        ^
0_0_16821497_10453.cpp: In function 'matrix multim(matrix, matrix)':
0_0_16821497_10453.cpp:75:8: error: redefinition of 'matrix multim(matrix, matrix)'
 matrix multim(matrix A,matrix B)
        ^
0_0_16821497_10453.cpp:16:8: note: 'matrix multim(matrix, matrix)' previously defined here
 matrix multim(matrix A,matrix B)
        ^
0_0_16821497_10453.cpp: In function 'matrix calculate(matrix, int)':
0_0_16821497_10453.cpp:86:8: error: redefinition of 'matrix calculate(matrix, int)'
 matrix calculate(matrix A,int n)
        ^
0_0_16821497_10453.cpp:27:8: note: 'matrix calculate(matrix, int)' previously defined here
 matrix calculate(matrix A,int n)
        ^
0_0_16821497_10453.cpp: In function 'int main()':
0_0_16821497_10453.cpp:94:5: error: redefinition of 'int main()'
 int main()
     ^
0_0_16821497_10453.cpp:35:5: note: 'int main()' previously defined here
 int main()
     ^


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