CSC264 Computer Org & Arch II - C Arrays of Strings Problem Set

Problem Set: Arrays of Strings in C

void printstrs(char strarr[][51], int numstr) {
    int i;
    for (i = 0 ; i < numstr ; i++)
        printf("%s\n", strarr[i]);

}

int findSmallest(char strarr[][51], int numstr) {
    int small = 0;
    int i;
    for (i = 1 ; i < numstr ; i++)
        if (strcmp(strarr[small], strarr[i]) > 0)
            small = i;
    return small;

}

void removeNL(char strarr[][51], int numstr) {
    int i, k;
    int loc;

    // outer loop is for each string in the array
    for (i = 0 ; i < numstr ; i++) {

        //  inner loop is to find the null byte (has no body)
        for (k = 0 ; strarr[i][k] != '\0' ; k++);

        // if char before null byte is newline, replace it with null byte
        if (strarr[i][k-1] == '\n')
            strarr[i][k-1] = '\0';
    }
}

void toUpper(char string[]) {
    int i;
    for (i = 0 ; string[i] != '\0' ; i++)

        // check for lower case letter, and if so, subtract 32 to go
        // from ascii code of lowercase to ascii code of same letter in
        // uppercase
        if (string[i] >= 97 && string[i] <= 122)
            string[i] = string[i] - 32;
}

void readStrings(FILE *infile, char strarr[][51], int numstr) {
    int i;
    for (i = 0 ; i < numstr ; i++)
        fgets(strarr[i], 51, infile);
}

void printstrs(char [][51], int);
void readstring(FILE *, char [], int);
int findSmallest(char [][51], int);
void removeNL(char [][51], int);
void toUpper(char[]);
void readStrings(FILE *, char [][51], int);

int main(int argc, char** argv) {
    int i;
    char fileName[31];
    // array of 10 strings which can hold 50 char each
    char strings[10][51];

    puts("enter your file name");
    gets(fileName);
    FILE *infile = fopen(fileName, "r");

    readStrings(infile, strings, 10);
    printstrs(strings, 10);
    printf("\n");
    removeNL(strings, 10);
    printstrs(strings, 10);
    printf("\n");
    int small = findSmallest(strings, 10);
    printf("the smallest is %s in location %d\n\n", strings[small], small);
    printf("\n");

    for (i = 0 ; i < 10 ; i++)
        toUpper(strings[i]);
    printstrs(strings, 10);
    printf("\n");
}