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Message: [QUOTE="Richard Weeks, post: 2994013"] Below is a fragment from a program that calculates statistics on x,y data. I want the user to be able to predict one or more predicted values of y from x, given the line of best fit. I have a procedural problem. predict: printf("\npredict y? (y/n): "); if((getc(stdin)=='n')) exit(EXIT_SUCCESS); //if((fgets(response, 1, stdin)=="n")) exit(EXIT_SUCCESS); else { printf("\nenter x: "); scanf("%lf", &xdatum); printf("\ny = %f\n", y_int + (slope * xdatum)); fflush(stdin); goto predict; } It works fine using getc, but when I use fgets execution jumps directly into the else{} block and prompts for x without waiting for user response to the y/n prompt. What am I doing wrong? Richard [/QUOTE]