Compilare: user.c:3:1: warning: data definition has no type or storage class [enabled by default] FlipLine(); ^ user.c:3:1: warning: type defaults to ‘int’ in declaration of ‘FlipLine’ [enabled by default] user.c:4:1: warning: data definition has no type or storage class [enabled by default] FlipCoulumn(); ^ user.c:4:1: warning: type defaults to ‘int’ in declaration of ‘FlipCoulumn’ [enabled by default] user.c: In function ‘main’: user.c:28:1: warning: implicit declaration of function ‘FlipColumn’ [-Wimplicit-function-declaration] FlipColumn(); ^ user.c:13:27: warning: unused variable ‘sum’ [-Wunused-variable] int i, j, posSum, negSum, sum; ^ user.c:13:19: warning: unused variable ‘negSum’ [-Wunused-variable] int i, j, posSum, negSum, sum; ^ user.c:13:11: warning: unused variable ‘posSum’ [-Wunused-variable] int i, j, posSum, negSum, sum; ^ user.c: At top level: user.c:47:1: warning: return type defaults to ‘int’ [enabled by default] FlipLine(){ ^ user.c:70:1: warning: return type defaults to ‘int’ [enabled by default] FlipColumn(){ ^ user.c: In function ‘main’: user.c:18:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &row); ^ user.c:19:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &col); ^ user.c:23:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &matrix[i][j]); ^ user.c: In function ‘FlipLine’: user.c:68:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘FlipColumn’: user.c:91:1: warning: control reaches end of non-void function [-Wreturn-type] } ^