Compilare: user.c: In function ‘main’: user.c:21:32: warning: left-hand operand of comma expression has no effect [-Wunused-value] for(i=0, j=frecv[0]; i<frecv[0], j<frecv[0]+frecv[1];){ // 1 - 2 ^ user.c:33:57: warning: left-hand operand of comma expression has no effect [-Wunused-value] for(i=frecv[0], j=frecv[0]+frecv[1]; i<frecv[0]+frecv[1], j<N;){ // 2 - 3 ^ user.c:45:41: warning: left-hand operand of comma expression has no effect [-Wunused-value] for(i=0, j=frecv[0]; i<frecv[0]+frecv[1], j<N;){ // 1 - 3 ^ user.c:15:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &N); ^ user.c:18:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &pattern[i]); ^