Thread: Scanning chars, ints, doubles and char arrays

So i have a program that asks the user a command (a letter) to run a specific method, it can be just the letter, a letter and some numbers, or a letter and another word, right now i have this:

Code:

char com;
char col [6];
char name [MAXELEMENTS];
int a, b;
double c;

  while(scanf(" %c", &com) == 1 && com != 'q'){
    if(com == 'p'){
        list(matrix);
        }
    else if(com == 'a'){
         scanf("%d %d %lf", &a, &b, &c);
             adds(a, b, c, matrix);
    }
    else if(com == 'i'){
         carac(matrix);
    }
    else if(com == 'l'){
         scanf("%d", &a);
         printLine(a, matrix);
    }
    else if(com == 'c'){
         scanf("%d", &a);
         printColumn(a, matrix);
    }
    else if(com == 'z'){
         scanf("%lf", &c);
         zero(c, matrix);
    }
    else if(com == 'o'){
         if((scanf("%s", col)) == 1)
        sortColumn(matrix);
    else if((scanf("%s", col)) == 0)
         sortLine(matrix);
    }
    else if(com == 'w'){
         if((scanf("%s", name)) == 1)
         ficheiro(name, matrix);
        else if((scanf("%s", name)) == 0)
         ficheiroNovo(matrix);
    }
    }

So i´m having trouble in the commands "o" and "w". On "o" you are supposed to have the option to just type "o" and it should run the method sortLine or you type the "o column" and it runs sortColumn. On "w" the same concept, you just type "w" and it runs ficheiroNovo or you type "w" plus a name and it should run ficheiro. The thing is i can´t just type "o" or "w", it always asks for another input and always runs the sortColumn or ficheiro. Does anyone know what´s wrong anc can someone help me?

I got to this point:

Code:

char input[82];
char col [6];
char name [MAXCARAC];
unsigned int a, b;
double c;

if(fgets(input, sizeof(input), stdin)){
        if(input[0] == 'q' && input[1] == '\n' && input[2] == '\0'){
            return -1;
        }
      
        if(input[0] == 'p' && input[1] == '\n' && input[2] == '\0'){
            list(matrix);
        }
        else if(input[0] == 'i' && input[1] == '\n' && input[2] == '\0'){
            carac(matrix);
        }
        else if((sscanf(input, "%c %u %u %lf\n", &input[0], &a, &b ,&c) == 4)){
            adds(a, b, c, matrix);
        }
        else if(input[0] == 'l' && (sscanf(input, "%u\n", &a) == 1)){
            printLine(a , matrix);
        }
        else if(input[0] == 'c' && (sscanf(input, "%u\n", &a) == 1)){
            printColumn(a , matrix);
        }
        else if(input[0] == 'z' && (sscanf(input, "%u\n", &a) == 1)){
            zero(a , matrix);
        }
        else if(input[0] == 'o' && input[1] == '\n' && input[2] == '\0'){
            sortLine(matrix);
        }
        if(input[0] == 'o' && (sscanf(input, "%s\n", col) == 1) ){
            sortColumn(matrix);
        }
        else if(input[0] == 'w' && input[1] == '\n' && input[2] == '\0'){
            file(matrix);
        }
        if(input[0] == 'w' && (sscanf(input, "%s\n", name) == 1) ){
            newFile(name, matrix);
        }

      

             
    }

But im struggling with the "q" command that is supposed to exit the program... any advice on how i should do it?

Like this?

Code:

char input[82];
char col [6];
char name [MAXCARAC];
unsigned int a, b;
double c;

if(fgets(input, sizeof(input), stdin)){
     while(input[0] != 'q'){
        if(input[0] == 'p' && input[1] == '\n' && input[2] == '\0'){
            list(matrix);
        }
        else if(input[0] == 'i' && input[1] == '\n' && input[2] == '\0'){
            carac(matrix);
        }
        else if((sscanf(input, "%c %u %u %lf\n", &input[0], &a, &b ,&c) == 4)){
            adds(a, b, c, matrix);
        }
        else if(input[0] == 'l' && (sscanf(input, "%u\n", &a) == 1)){
            printLine(a , matrix);
        }
        else if(input[0] == 'c' && (sscanf(input, "%u\n", &a) == 1)){
            printColumn(a , matrix);
        }
        else if(input[0] == 'z' && (sscanf(input, "%u\n", &a) == 1)){
            zero(a , matrix);
        }
        else if(input[0] == 'o' && input[1] == '\n' && input[2] == '\0'){
            sortLine(matrix);
        }
        if(input[0] == 'o' && (sscanf(input, "%s\n", col) == 1) ){
            sortColumn(matrix);
        }
        else if(input[0] == 'w' && input[1] == '\n' && input[2] == '\0'){
            file(matrix);
        }
        if(input[0] == 'w' && (sscanf(input, "%s\n", name) == 1) ){
            newFile(name, matrix);
        }




    }

I already tried it, but the first command i type keeps running non stop

Thanks a lot, the "w" and "o" commands are working, but the "l", "c" and "z" aren´t doing anything, is something wrong with those ifs?