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#include <stdio.h>
char line[100];/* line of text from input */
int result; /* the result of the calculations */
char operator; /* operator the user specified */
int value; /* value specified after the operator */
main()
{
result = 0; /* initialize the result */
/* loop forever (or until break reached) */
while (1) {
(void) printf("Result: %d\n", result);
(void) printf("Enter operator and number: ");
(void) fgets(line, sizeof(line), stdin);
(void) sscanf(line, "%c %d", &operator, &value);
if ((operator == 'q') || (operator == 'Q'))
break;
if (operator == '+') {
result += value;
} else if (operator == '-') {
result -= value;
} else if (operator == '*') {
result *= value;
} else if (operator == '/') {
if (value == 0) {
(void)printf("Error:Divide by zero\n");
(void)printf(" operation ignored\n");
} else
result /= value;
} else {
(void) printf("Unknown operator %c\n", operator);
}
}
return (0);
}
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