diff options
Diffstat (limited to 'ex1-13.c')
| -rw-r--r-- | ex1-13.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/ex1-13.c b/ex1-13.c new file mode 100644 index 0000000..87fe0b0 --- /dev/null +++ b/ex1-13.c @@ -0,0 +1,64 @@ +#include <stdio.h> +#include <stdint.h> +#include <stdbool.h> + +#define max_word 100 + +typedef enum _state {in,out} state; +bool is_word(char c) { + return c != ' ' + && c != '\t' + && c != '\n'; +} +/* print a histogram of word lengths + read from input + print histo to output + print errors warnings to output_err */ +int whisto(FILE* input, FILE* output, FILE* output_err) { + uint32_t lens[max_word]={0}; + int c = fgetc(input); + if (c == EOF) { + fprintf(output_err, "warning: no input!\n"); + goto spout; + } + state s = is_word(c) ? in : out; + uint32_t cl = s == in ? 1 : 0; + while ((c = fgetc(stdin))!= EOF){ + if (is_word(c)){ + if (s == in) { + cl++; + } else { + s = in; + cl=1; + } + } else { + if (s == in) { + s = out; + lens[cl]++; + } else { + // do nothing I guess + } + } + } + // need to count final word + if (s == in) { + lens[cl]++; + } +spout: + for(uint16_t i=1; + i<max_word; + i ++) { + fprintf(output, "%2d: ",i); + for(uint16_t j=0; + j<lens[i]; + j++) + fputc('-', output); + fputc('\n', output); + } + return 0; +} + +int main(void){ + whisto(stdin, stdout, stderr); +} +
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